共 30 条
[1]
Cooper R. G., 1990, R&D MANAGE, V20, P1
[8]
COOPER RG, 1976, EUROPEAN J MARKETING, V10
[9]
COOPER RG, 1979, J MARKETING, V43, P993
[10]
COOPER RG, 1984, EUR J MARKETING, V18, P1