Operations Research Proceedings 2019 Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Dresden, Germany, September 4-6, 2019 - Neufeld, Janis S. 1984-; Buscher, Udo; Lasch, Rainer 1961-; Möst, Dominik 1977-; Schönberger, Jörn 1973- (Operations Research Proceedings, GOR (Gesellschaft für Operations Research e.V.), 2020)