Authoritative (a pun!) French-language encyclopedia. The best place to start your research.
In the JMSS Virtual Library you will find this amazing e-book and other sources for literary criticism. Yes, it requires a password (see the key below), but it is well worth the extra step. You can go directly to the book, or you can use the search box on the Salem Press landing page and it will search for your topic in all of the titles that we own.