Multivariate Dispersion, Central Regions, and Depth The Lift Zonoid Approach Mosler Karl Heftet / 2002 / Engelsk
Operations Research and Economic Theory Essays in Honor of Martin J. Beckmann Hauptmann H. Heftet / 2011 / Engelsk
Operations Research ’92 Extended Abstracts of the 17th Symposium on Operations Research held at the Universität der Bundeswehr Hamburg at August 25–28, 1992 Karmann Alexander Heftet / 1993 / Engelsk
