Fu, Qiang, Weizheng Shen, Xiaoli Wei, Yanling Yin, Ping Zheng, Yonggen Zhang, Zhongbin Su, and Chunjiang Zhao. “Predicting the Excretion of Feces, Urine and Nitrogen Using Support Vector Regression: A Case Study With Holstein Dry Cows”. International Journal of Agricultural and Biological Engineering 13, no. 2 (April 10, 2020): 48–56. Accessed December 26, 2025. https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/4781.