Chenyan, Li, Qiao Wei, Roland W. Melse, Li Lujun, Fridtjof E. de Buisonjé, Wang Yajing, and Dong Renjie. 2017. “Patterns of Dairy Manure Management in China”. International Journal of Agricultural and Biological Engineering 10 (3):227-36. https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/3048.