RUGMAN, Alan M.; BROECK, Julien van den a VERBEKE, Alain. Beyond the diamond: 21st conference : selected papers. Research in global strategic management. Bingley, U.K.: Emerald, 1995. ISBN 9781849505154. Dostupné také z: https://proxy.k.utb.cz/login?url=http://www.emeraldinsight.com/1064-4857/5.