Inayatullah, S., Rani, A., Siddiqi, T. A., Zaheer, H., Imtiaz, M., & Jafree, H. A. (2019). An Efficient Method for Pivoting Free Variables in Linear Programming: A Computational Approach. European Scientific Journal, ESJ, 15(9), 1. https://doi.org/10.19044/esj.2019.v15n9p1