Hoar, Matilda, et al. “Nitrogen Intake and Excretion in Male Kacang Goats Receiving Feed With Different Energy Levels”. Journal of Tropical Animal Science and Technology, vol. 7, no. 1, Jan. 2025, pp. 1-12, https://jurnal.unimor.ac.id/index.php/JTAST/article/view/7446.