Sabina Baraković and  Dragan Jevtić and  Jasmina Baraković Husić,  Modeling of Session Initiation Protocol Invite Transaction using Colored Petri Nets.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2012, vol. 61(1). 43 - 50
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/910.