Wang, Mingyue, and Rui Kong. “Study on the Characteristics of Potassium Salt International Trade Based on Complex Network”. Journal of Business Economics and Management 20, no. 5 (August 19, 2019): 1000-1021. Accessed November 24, 2024. https://mma.vgtu.lt/index.php/JBEM/article/view/10455.