Ramadhan, Sherzad, Hassan Koutaini, and Karwan Ali Ali. “The Significance of Enterprise Resource Planning (ERP) Systems in Aviation Industry”. European Scientific Journal, ESJ 15, no. 10 (April 30, 2019): 100. Accessed March 29, 2024. https://eujournal.org/index.php/esj/article/view/11986.