Johanson Lars: Code-copying in Irano-Turkic. In: Language Sciences. pp. 325-337. (1998)
Agyagási Klára: On the characteristics of Cheremiss linguistic interference on Chuvash. In: The Mainz meeting : proceedings of the Seventh International Conference on Turkish Linguistics, August 3-6, 1994. pp. 667-682. (1998)