Chia-Hung Chen and Shangyao Yan, Applying Lagrangian Relaxation-Based Algorithm for the Airline Coordinated Flight Scheduling Problems. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. June 2010, vol. 42(6). 660 - 667 [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10886.