Zhang, Fu, Limin Zheng, Wei Wang, Yafei Wang, and Jiajia Wang. 2018. “Development of Agricultural Bionic Mechanisms: Investigation of the Effects of Joint Angle and Pressure on the Stability of Goats Moving on Sloping Lands”. International Journal of Agricultural and Biological Engineering 11 (3):35-41. https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/3633.