Miloš Šeda and  Pavel Ošmera and  Jindřich Petrucha,  Systems with Queueing and their Simulation.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 51 - 57
    [viewed 12 July 2020]. Available from: https://publications.waset.org/pdf/8335.