arXiv.org A "highly-automated electronic archive and distribution server for research articles. Covered
areas include physics, mathematics, computer science, nonlinear sciences, quantitative biology and
EulerService This site, for the
Resources (EULER) Project, allows the user to search mathematical resources, such as books,
preprints, Web pages, abstracts, proceedings, serials, technical reports, and theses.
Digitalisierungs-Zentrum This site provides digital access to historical "data such as prints, manuscripts and
illustrations" including much mathematical literature.