共 16 条
[1]
Bain JS, 1956, BARRIERS NEW COMPETI, DOI 10.4159/harvard.9780674188037
[2]
BEGUN JW, 1977, THESIS U N CAROLINA
[5]
BORDEN NH, 1941, J MARKETING, V6, P89
[6]
CHRISTENSEN LR, 1971, ECONOMETRICA, V39, P255
[8]
FELDMAN R, 1975, DEC AM EC ASS M
[9]
GOLDMAN F, 1975, JUN WEST EC ASS M
[10]
HIRSCH MJ, 1968, OPTOMETRIC PROFESSIO