Further reading General studies Blinkenberg, Christian. The Thunderweapon In Religion And Folklore: a Study In Comparative Archaeology. Cambridge [Eng.]: The University press, 1911. Laurinkiene, Nijole. Senovés Lietuviu Dievas Perkunas. Vilnius, Lithuania: Lietuvu Literaturos Tautosakos Institutas. 1996. For the etymology of the Indo-European weather-god, see For the association with "stones", "mountains" and "heaven", see Proto-Indo-European deities Sky and weather gods Thunder gods Etymologies Nature gods Reconstructed words Proto-Indo-European mythology