Hansen, Flemming; Hansen, Lotte Yssing; Grønholdt, Lars (2002-01-01). "Modelling purchases as a function of advertising and promotion". International Journal of Advertising. 21 (1): 115–135. doi:10.1080/02650487.2002.11104919. ISSN0265-0487. S2CID155838554.
Hansen, Flemming; Hansen, Lotte Yssing; Grønholdt, Lars (2002-01-01). "Modelling purchases as a function of advertising and promotion". International Journal of Advertising. 21 (1): 115–135. doi:10.1080/02650487.2002.11104919. ISSN0265-0487. S2CID155838554.
Hansen, Flemming; Hansen, Lotte Yssing; Grønholdt, Lars (2002-01-01). "Modelling purchases as a function of advertising and promotion". International Journal of Advertising. 21 (1): 115–135. doi:10.1080/02650487.2002.11104919. ISSN0265-0487. S2CID155838554.