//-->
News as a public good : cooperative ownership, price commitments, and the success of the Associated Press
Shmanske, Stephen, (1986)
Nachrichtenagenturen im Wettbewerb : Ursachen, Faktoren, Perspektiven
Wilke, Jürgen, (1997)
News media incentives, coverage of government, and the growth of government
Sutter, Daniel, (2004)