Beekes, Robert S.P. 1995. Comparative Indo-European linguistics. An introduction. Amsterdam: John Benjamins.; Burlak, S. 1995. The historical phonetics of Tocharian languages. Moscow.; Gamkrelidze, T. & V. Ivanov. 1984. Indo-European language and Indo-Europeans. Moscow.; Pokorny, Julius. 1994. Indogermanisches etymologisches Wörterbuch. I-II. 3 ed. Tübingen: Francke Verlag.
@misc{1945,
author = {Beekes, Robert S.P.},
title = {Comparative Indo-European linguistics. An introduction. Amsterdam: John Benjamins.; Burlak, S. 1995. The historical phonetics of Tocharian languages. Moscow.; Gamkrelidze, T. & V. Ivanov. 1984. Indo-European language and Indo-Europeans. Moscow.; Pokorny, Julius. 1994. Indogermanisches etymologisches Wörterbuch. I-II. 3 ed. Tübingen: Francke Verlag.},
year = {1995}
}