Books (20) E-Books (26) Articles (Online) (3125) OpenAccess-fulltext (5292) more... Bookchapter (Print) (14) Thesis (2) Articles (Print) (4) Bookchapter (Online) (86) Thesis (Online) (3) Video (DVD/CD) (1) Audio (Online) (1) less...
german (19) english (6423) more... italian (256) latin (30) french (89) spanish (311) portuguese (418) swedish (7) polish (1) less...