Data mining for small shops: Empowering brick-and-mortar stores through BI functionalities of a loyalty program1
M.R. Kamm, J.-P. Kucklick, J. Schneider, J. vom Brocke, Information Systems Management 38 (2020) 270–286.

Advancing Research on Loyalty Programs: A Future Research Agenda.
E. Breugelmans, T.H.A. Bijmolt, J. Zhang, L.J. Basso, M. Dorotic, P. Kopalle, A. Minnema, W.J. Mijnlieff, N. Wünderlich, Marketing Letters 26 (2015) 127–139.