@article {86173,
	title = {Joint economic lot sizing problem for a three{\textemdash}Layer supply chain with stochastic demand},
	year = {2014},
	url = {http://www.sciencedirect.com/science/article/pii/S0925527314000176},
	author = {Abdelsalam, Hisham M and Magy M. Elassal}
}
