Ogunleye, O. O., M. A. Waheed, and G. A. Odewole. 2005. “OPTIMAL ALLOCATION OF PIPE DIAMETERS IN PIPE NETWORKS USING MODIFIED ASSIGNMENT PROBLEM APPROACH”. LAUTECH Journal of Engineering and Technology 3 (1):76-81. https://laujet.com/index.php/laujet/article/view/256.