Graph-Theoretic Concepts in Computer Science 44th International Workshop, WG 2018, Cottbus, Germany, June 27-29, 2018, Proceedings - Brandstädt, Andreas; Brandstädt, Andreas; Köhler, Ekkehard; Köhler, Ekkehard; Meer, Klaus; Meer, Klaus (Springer International Publishing : Imprint: Springer, 2018)