Stephens, M.S., I. Njoku, and K.E. Andero. “Economic Effects of Covid-19 Outbreak on Airlines’ Performance in Nigeria”. International Journal of Scientific Research in Computer Science and Engineering 11, no. 5 (October 31, 2023): 23–38. Accessed July 9, 2025. https://ijsrcse.isroset.org/index.php/j/article/view/546.