Integer Flow with Multipliers: The Special Case of Multipliers 1 and 2. - Birgit Engels; Sven Oliver Krumke; Rainer Schrader; Christiane Zeck (CTW, 2009)

Extensions to online delay management on a single train line: new bounds for delay minimization and profit maximization. - Sven Oliver Krumke; Clemens Thielen; Christiane Zeck (Math. Methods Oper. Res., 2011)

Generalized max flow in series-parallel graphs. - Sven Oliver Krumke; Christiane Zeck (Discret. Optim., 2013)