Kalala, Jean Rene, Andrei Hanchar, and Mirosława Witkowska-Dąbrowska. “Foreign Trade of the Democratic Republic of the Congo and the Share of Agricultural Products for Export”. Olsztyn Economic Journal 15, no. 2 (August 31, 2020): 113–127. Accessed May 5, 2024. https://czasopisma.uwm.edu.pl/index.php/oej/article/view/5835.