@book{5315,
	author = {Okugchi, Koji and Szidarovoszky, Ferenc and Szidarovoszky, Ferenc;jt.auth.},
	title = {The theory of oligopoly with multi-product firms},
	publisher = {Springer-Verlag},
	year = {1990},
	series = {Lecture notes in Economics and Mathematical System},
	address = {Berlin}
}