Luis Veloso Eduardo Cerqueira Paulo Mendes Edmundo Monteiro Seamless Mobility of Senders Transmitting Multi-user Sessions over Heterogeneous Networks. 121-132 2009 WWIC http://dx.doi.org/10.1007/978-3-642-02118-3_11 conf/wwic/2009 db/conf/wwic/wwic2009.html#VelosoCMM09