Abaev, Pavel, Yulia Gaidamaka, Konstantin Samouylov, Alexander Pechinkin, Rostislav Razumchik, and Sergey Shorgin. 2014. “Hysteretic Control Technique for Overload Problem Solution in Network of SIP Servers”. Computing and Informatics 33 (1):218-36. http://147.213.75.17/ojs/index.php/cai/article/view/2389.