@book{198463,
	author = {Day, George S;Reibstein, David J;Gunther, Robert E and Day, George S;Gunther, Robert E.;Reibstein, David J},
	title = {Wharton on dynamic competitive strategy.},
	publisher = {John Wiley and Sons},
	year = {1997},
	address = {New York},
	edition = {1}
}