Database (MosLex) by Alexei Kassian, which compares basic vocabulary for Dené-Caucasian languages Dené–Caucasian ethno-linguistic map The Tower of Babel (site in English and Russian including Proposed family tree and Word-final resonants in Sino-Caucasian) A Final (?) Response to the Basque Debate in Mother Tongue 1 (GIF) Merritt Ruhlen on the Dené–Caucasian hypothesis(PDF) Proposed language families