Channel Management Strategy in the eCommerce Environment - A Portfolio Management Approach. - Timothy Hyungsoo Jung; Panos Louvieris; Harmen Oppewal (ENTER, 2002)

Conjoint modeling of residential group preferences: A comparison of the internal validity of hierarchical information integration approaches. - Eric J. E. Molin; Harmen Oppewal; Harry J. P. Timmermans (J. Geogr. Syst., 2002)