//-->
Zur Theorie des Absatzes : Erich Gutenberg zum 75. Geburtstag
Koch, Helmut, (1973)
A new price-advertising-interaction model : theory, empir. evidence and managerial implications
Simon, Hermann, (1987)
Mengenbezogene Preisdifferenzierung bei Dienstleistungen
Skiera, Bernd, (1999)
An empitical test of hypotheses relating to span of control
Udell, Jon C., (1967)
How important is pricing in competitive strategy?
A model of non-price competitive strategy
Udell, Jon C., (1963)