Transferring Portfolio Selection Theory to Customer Portfolio Management - The Case of an e-Tailer. - Dennis Kundisch; Stefan Sackmann; Markus Ruch (FinanceCom, 2007)

CRM and Customer Portfolio Management for E-Tailers. - Dennis Kundisch; Stefan Sackmann; Markus Ruch (HICSS, 2008)

CRM, Kundenbewertung und Risk-Return-Steuerung im betrieblichen Einsatz. - Stefan Sackmann; Dennis Kundisch; Markus Ruch (HMD Prax. Wirtsch., 2008)

Customer-Specific Transaction Risk Management in E-Commerce. - Markus Ruch; Stefan Sackmann (AMCIS/SIGeBIZ, 2009)

Customer Specific Transaction Risk Management in eCommerce. - Markus Ruch; Stefan Sackmann (AMCIS, 2009)

Integrating management of customer value and risk in e-commerce. - Markus Ruch; Stefan Sackmann (Inf. Syst. E Bus. Manag., 2012)