Algorithms and Models for the Web Graph 16th International Workshop, WAW 2019, Brisbane, QLD, Australia, July 6-7, 2019, Proceedings - Avrachenkov, Konstantin; Avrachenkov, Konstantin; Prałat, Paweł; Prałat, Paweł; Ye, Nan; Ye, Nan (Springer International Publishing : Imprint: Springer, 2019)