E. A. Ejem, V. N. Ikeogu, C. L. Okafor, and P. O. Erumaka, “Performance evaluation of terminal airspace system safety, delay and predictability of Muritala Mohammed International Airport, Ikeja Lagos, Nigeria”, J. sustain. dev. transp. logist., vol. 5, no. 2, pp. 62–72, Nov. 2020.