Malovichko, Alexander, and Vladimir Kozyrski. “Could the Language of Primitive Hunter Be Saved? (Language Monogenesis — III)”. Origin of language and culture: ancient history of mankind 1, no. 4 (April 25, 2007): 18–24. Accessed May 3, 2024. https://publishing.socionic.info/index.php/language/article/view/172.