DRUZHKOVA, A. S. et al. (2013) – Zootier Lexikon
https://www.zootier-lexikon.org/bibliographie/d-1699975706/druzhkova-a-s-thalmann-o-trifonov-v-a-leonard-j-a-vorobieva-n-v-ovodov-n-d-graphodatsky-a-s-wayne-r-k-2013In order to evaluate the genetic relationship of one of the oldest dogs, we have