“Solving Linear Fractional Programming Problems (LFP) by Using Denominator Function Restriction Method and Compare It With Linear Transformations Method”. Journal of Economics and Administrative Sciences 22, no. 94 (December 1, 2016): 480. Accessed May 7, 2024. https://jeasiq.uobaghdad.edu.iq/index.php/JEASIQ/article/view/419.