Books

A collection of links to catalogues, databases etc.

ULB-Catalogue (OPAC)

ULB - List of Catalogues

Digital Library NRW (HBZ)

German libraries online (DigiBib)

Münster City Library

Publishers

Academic Press

AMS

DeGruyter

Elsevier

SIAM

Springer

Wiley

Encyclopedias

Encyclopedia of Mathematics
The Encyclopedia of Mathematics wiki is an open access resource designed specifically for the mathematics community.

Mathworld
„The web’s most extensive mathematics resource"

Planet Math.org

Wikipedia
The free encyclopedia

Dictionaries

LEO German-English Dictionary