@ARTICLE{Gutkowski_P._The_2012, author={Gutkowski, P. and Kaczmarek, S.}, volume={60}, number={No 1}, journal={Bulletin of the Polish Academy of Sciences Technical Sciences}, pages={95-101}, howpublished={online}, year={2012}, title={The model of end-to-end call setup time calculation for Session Initiation Protocol}, URL={http://journals.pan.pl/Content/83488/PDF/14_paper.pdf}, doi={10.2478/v10175-012-0014-9}, }