1.Informative advertising with differentiated products
[size=-1]GM Grossman, C Shapiro - The Review of Economic Studies, 1984 - JSTOR

[size=-1]2。
Pricing differentiated products with indifferent consumers
[size=-1]R Santore - Economics letters, 1999 - Elsevier
3。
Collusive pricing in markets for vertically differentiated products
[size=-1]J Häckner - International Journal of Industrial Organization, 1994 - Elsevier

4.

Product and price competition in a two-dimensional vertical differentiation model
[size=-1]MB Vandenbosch, CB Weinberg - Marketing Science, 1995 - JSTOR