Tambovtsev, Yuri. “Is the Taxon of Altaic Languages Natural or Artificial?”. Lingua Posnaniensis 51, no. 1 (January 14, 2010): 133–154. Accessed July 18, 2024. https://pressto.amu.edu.pl/index.php/linpo/article/view/v10122-009-0009-7.