The editors and publisher of OR Spectrum are pleased to announce the following reviewers who have done an outstanding job in submitting reviews during the time of origin of volume 38:

Marco Bijvank, University of Calgary, Calgary, Canada

Jochen Gönsch, University Duisbug Essen, Duisburg, Germany

Raimund Kovacevic, University of Vienna, Vienna, Austria

Nilay Noyan, Sabanci University, Istanbul, Turkey

Armin Scholl, Friedrich Schiller University Jena, Jena, Germany