1. Coleman CY. Finally, supermarkets find ways to increase their profit margins. Wall Street Journal 1997; May 27, A1 and A6.
2. Issues and perspectives on retail productivity;Achabal;Journal of Retailing,1984
3. Channel productivity;Bultez;International Journal of Research in Marketing,1998
4. Services marketing;Lovelock,1996
5. Measuring retailer performance;Keh;Journal of Targeting, Measurement and Analysis for Marketing,2000