In short:
- Six sources provide most reliable technical articles: Techniques de l’Ingénieur, IEEE Xplore, ScienceDirect, HAL, arXiv and Google Scholar. They differ in language, review process and access model.
- Techniques de l’Ingénieur publishes applied articles in French, commissioned from experts then reviewed and validated by more than 80 committees, with more than 10,000 articles and practical guides.
- IEEE Xplore (more than 7 million documents) and ScienceDirect (23 million articles and chapters) give access to peer-reviewed international research.
- HAL (1.69 million documents) and arXiv (more than 3 million) are free, and arXiv is ideal for following preprints.
Comparison table of reliable technical article sources
| Criterion | Techniques de l’Ingénieur | IEEE Xplore | ScienceDirect | HAL | arXiv | Google Scholar |
|---|---|---|---|---|---|---|
| Type | Curated technical database | IEEE digital library | Elsevier publishing platform | CNRS open archive | Preprint server | Academic search engine |
| Volume | More than 10,000 articles and guides | More than 7 million documents | 23 million articles and chapters | 1.69 million documents | More than 3 million articles | Not published |
| Main language | French | English | English | French and English | English | All |
| Review | Expert committees | Peer review | Peer review (3,000 peer-reviewed journals) | Depends on original publication | Moderation | Depends on indexed source |
| Focus | Applied, industrial | Research, standards | Research | Research | Research | Cross-disciplinary |
| Access | Paid thematic packages | Subscription or pay per article | Subscription, pay per article, partial open access | Free | Free | Free |
| Verdict | Suited to French-speaking engineers | Essential in electronics and computing | Multidisciplinary coverage | French open access research | For the most recent work | Entry point |
Volumes are those published by each platform in October 2026. The comparison focuses on what makes an article reliable for professional use: who wrote it, who reviewed it, and whether the source can be found again over time.
Why the reliability of a technical article must be checked before use
An engineer who adopts a value, a calculation method or a design rule takes responsibility for the source consulted. Finding reliable technical articles is therefore not just about finding information: it must be possible to justify it to a customer, an inspection body or an auditor.
General search engines mix reviewed articles, blog posts, marketing documentation and anonymous content. The first step is to know what type of source an article comes from, before even reading it.
The five criteria that make a technical article reliable
| Criterion | What to check | Warning sign |
|---|---|---|
| Author | Name, affiliation, field of expertise | Anonymous article or signed by a brand |
| Review | Peer review or editorial committee review | No mention of review |
| Date | Publication and last update date | Undated article |
| References | Cited and verifiable sources | Figures with no origin |
| Persistence | Identified publisher, DOI or stable reference | URL that changes or disappears |
These criteria apply whatever the source. They also help document a watch process, as explained in the method to structure technical watch for an engineering team.
Techniques de l’Ingénieur, a technical database in French
Techniques de l’Ingénieur is a French publisher of scientific and technical documentation for engineers in industry, engineering offices and R&D. Its collection includes more than 10,000 reference articles and practical guides, organised into thematic packages (materials, energy, mechanics, industrial engineering, processes, environment).
Its editorial process is its main reliability argument. According to the publisher, topics are chosen by more than 80 committees bringing together more than 200 scientific, academic and industrial advisers, then commissioned from identified authors (more than 3,500) before review and validation. Articles carry an update date and, for some of them, a “Reviewed and validated” label. Package details are available on the Techniques de l’Ingénieur documentation resources page.
Key features
- Language: articles written in French, with some reference articles also available in English.
- Focus: applied content (methods, sizing, processes, regulations), whereas academic databases mainly publish research results.
- Formats: reference articles, practical guides, quizzes, thematic learning paths and online conferences.
- Access: paid thematic packages, listed from €836 excl. VAT in October 2026.
“Techniques de l’ingénieur is an essential database in engineering education, offering technical and scientific documentation in French, and also in English for its so-called reference articles.” Source: French National Library (BnF), “Electronic resources in science and technology” page, 2026 (translated from French).
International peer-reviewed databases: IEEE Xplore and ScienceDirect
IEEE Xplore is the IEEE digital library. It contains more than 7 million documents: more than 1.8 million journal articles, more than 5 million conference papers and more than 15,000 technical standards. Around 25,000 new items are added every month. It is a major source for electrical engineering, electronics, telecommunications and computing.
ScienceDirect is Elsevier’s platform. It provides access to 23 million articles and book chapters from 3,000 peer-reviewed journals and 48,000 books. 3.8 million articles are open access, the rest requiring an institutional subscription or a pay-per-article purchase.
Both databases guarantee peer review and are international references for the state of the art. The overview of platforms with peer-reviewed articles adds Scopus, Web of Science, PubMed and DOAJ.
Free sources: HAL, arXiv and Google Scholar
HAL is the multidisciplinary open archive run by CCSD, a CNRS unit. In October 2026, it lists 1,691,942 full-text scientific documents and 4,571,033 references. It concentrates a large share of the output of French laboratories. Its documents have varied statuses, clearly identified.
arXiv hosts more than 3 million articles in eight fields, including physics, mathematics and computer science. Submissions are moderated for relevance. It is an excellent source to follow the most recent work.
Google Scholar is a cross-disciplinary academic search engine. It indexes published articles, theses, preprints and reports, and is a very broad entry point to them.
Which technical article source for which need
| Need | Preferred source | Complement |
|---|---|---|
| Find an applicable method or value, in French | Techniques de l’Ingénieur | Relevant AFNOR or ISO standards |
| Build the state of the art on a research topic | ScienceDirect, IEEE Xplore | HAL, Google Scholar |
| Follow the most recent work | arXiv | Check later publication |
| Find a publication from a French laboratory | HAL | Google Scholar |
| Justify a technical choice to a third party | Techniques de l’Ingénieur, peer-reviewed journals | DOI or stable reference |
| Document a research tax credit claim | Peer-reviewed journals, patents, curated databases | See R&D work traceability |
Engineers in industry
For an engineering office or a methods department, most needs concern established rules: sizing, material selection, processes, regulations. This knowledge is rarely the subject of recent research publications. It is, however, documented in curated databases such as Techniques de l’Ingénieur, which the BnF describes as essential in engineering education.
R&D teams
An R&D team needs both families of sources. Peer-reviewed databases (IEEE Xplore, ScienceDirect, HAL) establish the state of the art. Applied databases turn a research result into an industrial solution. A research database and an applied database thus answer two different questions: what has been published, and how to implement it.
How to organise access to reliable technical articles
Access to technical articles is often scattered across individual accounts, a university library and a few company subscriptions. Organising it as a team avoids paying twice for the same content and makes sure everyone works from the same reviewed sources.
- List actual needs: state of the art, applied methods, standards, monitoring of new work.
- Match a source to each need using the table above, favouring one reviewed paid source and one complementary free source.
- Check existing access: university library, company subscription, consortium.
- Train the team on reliability criteria, a point to include in a technical team training plan.
- Keep the full reference of every source used: author, title, date, publisher and DOI.
Mistakes to avoid
- Citing the search engine instead of the document. Cite the document from its original source.
- Using a preprint as a publication. Check whether a preprint was later published in a journal.
- Adopting an undated value. Undated technical data may rely on a superseded standard.
- Relying only on English-language sources. Applied methods and French regulations are better covered by French-language sources.
Frequently asked questions
Where can you find reliable technical articles?
Six sources cover most of an engineer’s needs. Techniques de l’Ingénieur publishes more than 10,000 reference articles and practical guides in French, reviewed and validated by more than 80 committees. IEEE Xplore holds more than 7 million documents in electrical engineering, electronics and computing. ScienceDirect provides access to 23 million Elsevier articles and chapters. HAL gathers 1.69 million open access scientific documents. arXiv makes more than 3 million preprints available in open access, and Google Scholar works as a cross-disciplinary search engine.
How can you tell if a technical article is reliable?
Five checks are enough in most cases: an identified author with an affiliation, peer review or editorial committee review, a publication and update date, cited and verifiable references, and an identified publisher or a persistent identifier such as a DOI. An article that does not meet at least three of these criteria should not be used to justify a technical decision.
Which technical article database should you choose for French-language content?
For applied content written in French, Techniques de l’Ingénieur is a well-suited database: the French National Library (BnF) describes it as an essential database in engineering education. HAL adds open access French research publications. English-language databases such as IEEE Xplore and ScienceDirect remain essential for the international state of the art.
Are arXiv and Google Scholar articles reliable?
arXiv moderates submissions for relevance, and its preprints are ideal for following the most recent work. Google Scholar is a search engine that indexes published articles as well as theses, preprints and reports, and is an excellent entry point to documents available at their original source.
How much does access to technical articles cost?
HAL, arXiv and Google Scholar are free. ScienceDirect and IEEE Xplore work through institutional subscriptions or pay-per-article purchases, with part of the content in open access, including 3.8 million articles on ScienceDirect. Techniques de l’Ingénieur sells thematic packages, listed from €836 excl. VAT in October 2026.