New optimality cuts for a single-vehicle stochastic routing problem. - Curt Hjorring; John Holt (Ann. Oper. Res., 1999)

Railway Crew Pairing Optimization. - Lennart Bengtsson; Rastislav Galia; Tomas Gustafsson; Curt Hjorring; Niklas Kohl (ATMOS, 2004)