English summary: Indo-European studies began with work undertaken by Friedrich Schlegel (1808). A few decades later Franz Bopp published the first introduction to the new subject with Part 1 of his "Comparative Grammar" (1833). Since then Indo-European studies have yielded a wealth of research material, from monumental works stretching to several volumes, to short elementary volumes; the last known book to be published was in 2007 The milestones...