Cohen, Eli; Ghiselli, Richard; Schwartz, Zvi (2007). "The Effect of Loss Leader Pricing on Restaurant Menus' Product Portfolio Analysis". Journal of Foodservice Business Research. 9: 21–38. doi:10.1300/j369v09n01_03. S2CID153968368.
Cohen, Eli; Ghiselli, Richard; Schwartz, Zvi (2007). "The Effect of Loss Leader Pricing on Restaurant Menus' Product Portfolio Analysis". Journal of Foodservice Business Research. 9: 21–38. doi:10.1300/j369v09n01_03. S2CID153968368.