Computing Moments of the Exit Time Distribution for Markov Processes by Linear Programming. - Kurt Helmes; Stefan Röhl; Richard H. Stockbridge (Oper. Res., 2001)

A Case Study of Joint Online Truck Scheduling and Inventory Management for Multiple Warehouses. - Christoph Helmberg; Stefan Röhl (Oper. Res., 2007)

A Geometrical Characterization of Multidimensional Hausdorff Polytopes with Applications to Exit Time Problems. - Kurt Helmes; Stefan Röhl (Math. Oper. Res., 2008)