A general approach to set safety stocks in multi-stage inventory systems under rolling horizon mathematical programming models / Youssef Boulaksil, Jan C. Fransoo, Enrico N.G. van HalmOrder release strategies to control outsourced operations in a supply chain / Youssef Boulaksil, Jan C. FransooExperts' stated behavior / Youssef Boulaksil and Philip Hans FransesStrategic and operational outsourcing : decisions in the pharmaceutical industry / Youssef Boulaksil and Jan C. FransooDual sourcing with contractmanufacturing : comparison between two different allocation strategies / Youssef Boulaksil and Jan C. Frausoo