European Mathematical Information Service, including Zentralblatt MATH
JSTOR (partially)
ProjectEuclid (partially)
Springer Books (partially)
ArXiv.org: Mathematics interface
HAL (Hyper Articles en Ligne): Mathematics
European Digital Mathematics Library
Czech Digital Mathematics Library
Numdam (French Digital Mathematics Library)
GDZ (Göttinger DigitalisierungsZentrum)
Digital Journal Library (DigiZeitschriften): Mathematics
All-Russian Mathematical Portal: English Russian
Catalogue fusionné des périodiques de mathématiques
IMMAQ Library (Université catolique de Louvain)
MDZ (Munich Digitization Center), part of Bavarian State Library