TY - JOUR ED - Grötschel, Martin TI - Special issue: Optimization stories. Selected papers based on the presentations at the 21st international symposium on mathematical programming, ISMP, Berlin, Germany, August 19--24, 2012 JO - Documenta mathematica PY - 2012 VL - Optimization Stories PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DOCMA_2012__S3__a44/ LA - en ID - DOCMA_2012__S3__a44 ER -