Priscila Solís Barreto Georges Amvame-Nze C. V. Silva Juliana Santos Sombra Oliveira Paulo Henrique Portela de Carvalho Humberto Abdalla Jr. Antonio José Martins Soares Ricardo Staciarini Puttini A Study of Billing Schemes in an Experimental Next Generation Network. 66-74 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3421&spage=66 2005 conf/icn/2005-2 ICN (2) db/conf/icn/icn2005-2.html#BarretoASOCASP05