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2015
Engels, Birgit and Schrader, Rainer (2015). Freight car dispatching with generalized flows. Networks, 66 (1). pp. 33-39. Wiley.
2011
Engels, Birgit (2011). A Generalized Network Model for Freight Car Distribution. PhD thesis, Universität zu Köln.
2010
Engels, Birgit (2010). The Transitive Minimum Manhattan Subnetwork Problem in 3 Dimensions. Discrete Applied Mathematics, 158 (4). pp. 298-307. Elsevier Science.
2009
Engels, Birgit and Pardella, Gregor (2009). A Note on the Complexity of Sliding Shortest Paths. Working Paper.