Salvatore Spadaro Josep Solé-Pareta Davide Careglio Krzysztof Wajda Andrzej Szymanski Positioning of the RPR standard in contemporary operator environments. 35-40 2004 18 IEEE Network 2 http://dx.doi.org/10.1109/MNET.2004.1276609 db/journals/network/network18.html#SpadaroSCWS04