Okuguchi, Koji, 1935- The theory of oligopoly with multi-product firms Koji Okuguchi, Ferenc Szidarovszky. - Berlin: Springer-Verlag, 1990. - 167 p. : ill. ; 25 cm. - Lectures notes in economics and mathematical systems 342 . p. 163-167 ISBN: 038752567X Subjects--Topical Terms: Oligopolies--Mathematical modelsGame theory