Layrab, S. D., T. Zangmo, and T. Gyelpo. “An Assessment of Fertility and Hatchability of Bhutanese Indigenous Chickens Using Natural Service and Artificial Insemination”. Bhutan Journal of Natural Resources and Development, vol. 10, no. 2, Dec. 2023, pp. 8-15, https://www.bjnrd.org/index.php/bjnrd/article/view/123.