Vitalice K. Oduol,  Transient Analysis of a Single-Server Queue with Batch Arrivals Using Modeling and Functions Akin to the Modified Bessel Functions.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2009, vol. 33(9). 1728 - 1733
    [viewed 25 February 2020]. Available from: https://publications.waset.org/pdf/4994.