@TECHREPORT{BS05, author = {Jerzy Brzeziński and Cezary Sobaniec}, title = {Safety of {VoSG} Consistency Protocol of Session Guarantees}, institution = CSPUT, year = {2005}, number = {RA-009/05}, month = may, csnote = {extended version of [BS06]}, keywords = {replication, session guarantees} }