By Leeflang P.S.H.   Koerts J.   in European Journal of Marketing

ISSN:0309-0566|7|3|203-217

Emerald Group Publishing Ltd‎(1993)‎

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By Bult J.R.   Leeflang P.S.H.   Wittink D.R.   in European Journal of Operational Research

ISSN:0377-2217|97|3|450-464

Elsevier‎(1997)‎

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