Davide Grillo Maurizio Montagna Franco Alfano Antonio Colombo Simone Ricci Implementation Options and Economics of Phased UMTS Deployment. 282-291 2002 4 Journal of Communications and Networks 4 http://jcn.or.kr/home/journal/include/downloadPdf.asp?articleuid={FF72CB25-CA79-4566-BC56-9F575FF20A58} db/journals/jcn/jcn4.html#GrilloMACR02