Text repositories:

1. General repositories:
   • Project Gutenberg;
   • Liber liber;
   • Perseus project;
   • Luminarium;
   • Labyrinth;
   • IPL;
   • Digital library .
2. Mathematics collections:
   • Cornell University;
   • LANL;
   • AMS.
3. Catalogues:
   • Library of Congress
   • University of Brescia