Reliability and Statistics in Transportation and Communication Selected Papers from the 18th International Conference on Reliability and Statistics in Transportation and Communication, RelStat'18, 17-20 October 2018, Riga, Latvia - Kabashkin, Igor; Kabashkin, Igor; Yatskiv (Jackiva), Irina; Yatskiv (Jackiva), Irina; Prentkovskis, Olegas; Prentkovskis, Olegas (Springer International Publishing : Imprint: Springer, 2019)