Ali, R., R. Khalid, and S. Qaiser. “A Discrete Event Simulation Analysis of the Bullwhip Effect in a Multi-Product and Multi-Echelon Supply Chain of Fast Moving Consumer Goods”. Pakistan Journal of Statistics and Operation Research, Vol. 16, no. 3, Aug. 2020, pp. 561-76, doi:10.18187/pjsor.v16i3.3088.