To Be or "Not To Be" in the Indo-European Languages

Xaverio Ballester, "To Be" or "Not To Be" in the Indo-European Languages, in Philip Baldi, Pietro U. Dini (eds.), Studies in Baltic and Indo-European Linguistics. In honor of William R. Schmalstieg, Amsterdam-Philadelphia, John Benjamins Publishing Company, 2004, pp. 7-18. https://web.archive.org/web/20241025213053/http://www.continuitas.org/texts/ballester_tobe.pdf