问题及解答

http://www.numdam.org/?lang=en

The NUMDAM web site (Numérisation de documents anciens mathématiques) offers an open access to the metadata and articles published in mathematical journals.

For each journal, all the volumes published up to year 2000 have been retro-digitzed. To date, 763 000 digitized pages and 43 000 articles are shown on the web site.

The articles themselves are available for online consultation after a period of time called moving wall. During this period (generally 5 years), they are reserved for journal subscribers only.