Charles-Owaba, O. E., V. Oladokun, and O. Okunade. “Development of the Contiguous-Cells Transportation Problem”. Engineering, Technology & Applied Science Research 5, no. 4 (August 17, 2015): 825–831. Accessed July 2, 2026. https://etasr.com/index.php/ETASR/article/view/546.