1Avery J, Steenburgh T, DeightonJ, et ak Adding bricks to click Pre- dicting the patterns of cross-channel elasticities over time]. Harvard Business School Marketing Research Paper, 2011 (07 -043).
2Valos M J. A qualitative study of multi-channel marketing perfor- mance measurement issues[]]. Journal of database marketing & customer strat- egy management, 2008, 15(4): 239 -248.
3Rhee E. Multi-channel management in direct marketing retailinN Traditional call center versus Intemet channel[J]. Journal of Database Market- ing& Customer Strategy Managemeng 2010, 17(2): 70-77.