Universität zu Köln

Engels, Birgit (2011). A Generalized Network Model for Freight Car Distribution. PhD thesis, Universität zu Köln.

Engels, Birgit (2010). The Transitive Minimum Manhattan Subnetwork Problem in 3 Dimensions. Discrete Applied Mathematics, 158 (4). pp. 298-307. Elsevier Science.

Engels, Birgit and Pardella, Gregor (2009). A Note on the Complexity of Sliding Shortest Paths. Working Paper.

Engels, Birgit and Schrader, Rainer (2015). Freight car dispatching with generalized flows. Networks, 66 (1). pp. 33-39. Wiley.