Véase, por ejemplo:
Pan, Hui, ed. (octubre de 2004). «Vonage and Cisco to sell phone equipment». VoIP Monthly Newsletter (Information Gatekeepers Inc) 2 (10): 3. Consultado el 4 de julio de 2014. «APEJ (Asia-Pacific Excluding Japan) and EEMEA (Eastern Europe, Middle East, and Africa) will grow their combined share of this figure from 17 percent to 22 percent during the same period, as North America's share adjusts from 53 percent to 46 percent.»
(en inglés)
