Ayawei, Stella. “Organizational Structures and Operational Effectiveness of Transport Companies in South-South Nigeria”. Faculty of Natural and Applied Sciences Journal of Mathematical Modeling and Numerical Simulation 2, no. 1 (September 30, 2024): 176–184. Accessed December 8, 2025. https://www.fnasjournals.com/index.php/FNAS-JMNS/article/view/551.