Schankerman, M. (1991). How valuable is patent protection ?: Estimates by technology field ussing patent renewal data. National Bureau of Economic Research.
Chicago-Zitierstil (17. Ausg.)Schankerman, Mark. How Valuable Is Patent Protection ?: Estimates by Technology Field Ussing Patent Renewal Data. Cambridge, Mass: National Bureau of Economic Research, 1991.
MLA-Zitierstil (9. Ausg.)Schankerman, Mark. How Valuable Is Patent Protection ?: Estimates by Technology Field Ussing Patent Renewal Data. National Bureau of Economic Research, 1991.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.