1. The performance of glottochronology in Germanic;Arndt;Language,1959
2. On the validity of glottochronology;Bergslund;Current Anthropology,1962
3. The lexicon in acquisition;Clark,1993
4. The rise and fall of languages;Dixon,1997
5. The validity of glottochronology on the basis of the Slavic languages;Fodor;Studia Slavica,1961