@ARTICLE{Gębarowski_Tomasz_A_2012, author={Gębarowski, Tomasz}, volume={vol. 58}, number={No 1}, journal={International Journal of Electronics and Telecommunications}, howpublished={online}, year={2012}, publisher={Polish Academy of Sciences Committee of Electronics and Telecommunications}, title={A Hybrid Extension for IP Multicasting in Push-to-talk over Cellular Systems}, URL={http://www.czasopisma.pan.pl/Content/87096/PDF/11.pdf}, doi={10.2478/v10177-012-0011-9}, }