1. Yak production in Nepal;Joshi,1994
2. Yak and its domestication;Das;Asian Agric History,1998
3. The annual report;District Livestock Service Office,2013
4. Kharel M. Yak, jholang, mountain cattle and their crossbreds in Nepal. Proceedings of Fourth Global Conference on Conservation of Domestic Animal Genetic Resources; 1998 Aug 17-21; NARC, Nepal and RBI, UK.