Cui, Siyuan, et al. “Evaluation of Ecosystem Service of Straw Return to Soil in a Wheat Field of China”. International Journal of Agricultural and Biological Engineering, vol. 14, no. 1, Feb. 2021, pp. 192-8, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/5698.