El-Sherbeny, N.A.-M. (2015) “Minimum Convex and Differentiable Cost Flow Problem with Time Windows”, International Journal of Sciences: Basic and Applied Research (IJSBAR), 20(1), pp. 139–150. Available at: https://gssrr.org/JournalOfBasicAndApplied/article/view/3368 (Accessed: 18 September 2025).