Dorji, N., and N. Gyeltshen. “Prevalence of Gastrointestinal Parasites in Free Range Yaks of North-Western and Central Bhutan”. Bhutan Journal of Natural Resources and Development, vol. 11, no. 1, June 2024, pp. 48-57, https://www.bjnrd.org/index.php/bjnrd/article/view/141.