I've been searching for scientific article about the crusades but I can't find anything good. I've been searching for french sources mainly but I've looked a bit of english sources but all I can find is either books or vulgarisation articles. (I'm really not certain how to translate this in english)
When you say "scientific" do you mean "academic" or are you looking for articles that use science like chemistry or physics to examine the crusades? I can't answer your question unfortunately, but hopefully this clarification will help others to answer.
If you don't get an answer here I recommend asking in a Saturday Reading and Research weekly thread. That's a good place to get recommendations. You may also be able to ask in the Theory Thursday weekly thread, but I'm less familiar with that one and am not sure your question would fit that theme. Perhaps a mod could clarify if a request for resources would fit into that thread. There is also the Friday Free-for-All thread, which usually gets a large audience but is also less focused than other threads.
Hi! Hopefully someone can help you directly, but I've taken a look through the sub for recommendations of books on the Third Crusade. Take a look at these comments. All of the posts have been archived so you can't ask follow-up questions in them, but if you do have questions about the books for any of the users, just ask them here and tag their username so they'll be notified.
In the AskHistorians book list: High Middle Ages | Military History
/u/ombudsmen, /u/Valkine and /u/shlin28 recommend various authors and books What are the most respected resources discussing The Crusades (1095-1291)? How about pre-crusades and later "crusades"? ; /u/Valkine has a few more comments on sources at the end of this post Why did three kings join the Third Crusade? Were there material reasons?
another comment by /u/Valkine and more book recommendations from /u/token_bastard Can anybody recommend some good books for somebody who is looking to become educated on what life was like in the Holy Land during the Crusades.
/u/labarge3 has a few more Question about Saladin and King Richard's relationship during the Third Crusade.
/u/thejukeboxhero gives advice on where to look for academic sources Sources for Information on the Third Crusade
Also, if you'd like recommendations in languages other than English, do say so: many of the flaired users are multilingual.
Recommending academic articles is tricky because there are so many published in several journals and books. Articles tend to be on very specific topics as well, so it's hard to make a generic recommendation on a subject as wide as The Crusades. You'll also probably find that a lot of articles on Crusades history (in English anyway) were published in books. I can recommend a few places to look, though.
If you have access to it, possibly via a college, the International Medieval Bibliography is a great way to find academic articles relating to medieval history. It's not perfect, it misses some things, but it's a great start.
Another option which is free is deremilitari.org which hosts quite a few articles and excerpts from primary sources. For a free site it has a surprising range of articles.
If you feel like you've learned as much as you can from books and popular history articles you might want to sit down and read some primary sources. The Recueil des historiens des croisades is a legendary publication in Crusades history. It includes almost every document relating to the Crusades and was published in the late 19th and early 20th centuries. The Bibliotheque National has apparently published a PDF with the documents in their original language and in French translation that you can get online for free.