Jiang, Qinghai, et al. “Modeling and Analysis of Pelletization Process Based on a Multi-Hole Pelletizing Device”. International Journal of Agricultural and Biological Engineering, vol. 12, no. 1, Feb. 2019, pp. 17-23, https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/3264.