Airline Crew Rostering: Problem Types, Modeling, and Optimization - Niklas Kohl; Stefan E. Karisch (Ann. Oper. Res., 2004)

Railway Crew Pairing Optimization - Lennart Bengtsson; Rastislav Galia; Tomas Gustafsson; Curt Hjorring; Niklas Kohl (Algorithmic Methods for Railway Optimization, International Dagstuhl Workshop, Dagstuhl Castle, Germany, June 20-25, 2004, 4th International Workshop, ATMOS 2004, Bergen, Norway, September 16-17, 2004, Revised Selected Papers, 2004)

Constraint Programming Based Column Generation for Crew Assignment - Torsten Fahle; Ulrich Junker; Stefan E. Karisch; Niklas Kohl; Meinolf Sellmann; Bo Vaaben (J. Heuristics, 2002)

2-Path Cuts for the Vehicle Routing Problem with Time Windows - Niklas Kohl; Jacques Desrosiers; Oli B. G. Madsen; Marius M. Solomon; François Soumis (Transp. Sci., 1999)

A Framework for Constraint Programming Based Column Generation - Ulrich Junker; Stefan E. Karisch; Niklas Kohl; Bo Vaaben; Torsten Fahle; Meinolf Sellmann (Principles and Practice of Constraint Programming - CP'99, 5th International Conference, Alexandria, Virginia, USA, October 11-14, 1999, Proceedings, 1999)

An Optimization Algorithm for the Vehicle Routing Problem with Time Windows Based on Lagrangian Relaxation - Niklas Kohl; Oli B. G. Madsen (Oper. Res., 1997)