C. . Mallick, S. K. . Bhoi, T. . Singh, K. . Hussain, B. . Riskhan, and K. S. . Sahoo, “Cost Minimization of Airline Crew Scheduling Problem Using Assignment Technique”, Int J Intell Syst Appl Eng, vol. 11, no. 7s, pp. 285–298, Jul. 2023.