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Lueckerath, Daniel, Ullrich, Oliver, Rishe, Naphtali and Speckenmeyer, Ewald (2018). A disjunctive program formulation to generate regular public transit timetables adhering to prioritized planning requirements. Networks, 72 (2). S. 217 - 238. HOBOKEN: WILEY. ISSN 1097-0037
Ullrich, Oliver, Lueckerath, Daniel and Speckenmeyer, Ewald (2016). Do regular timetables help to reduce delays in tram networks? It depends! Public Transport, 8 (1). S. 39 - 57. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1613-7159