M. A. Ferreira and J. A. Filipe, "Study of a collection of service time distributions and impact in the respective M|G|8 system busy period parameters", in 17th Conf. on Applied Mathematics, APLIMAT 2018, Dagmar Szarková, Daniela Richtáriková, Peter Letavaj, Jana Gabková, Ed., Bratislava, Slovak University of Technology, 2018, pp. 356-364