@techreport{GamrathMelchioriBertholdetal.2015, author = {Gerald Gamrath and Anna Melchiori and Timo Berthold and Ambros Gleixner and Domenico Salvagnin}, title = {Branching on multi-aggregated variables}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {15-10}, language = {eng}, year = {2015} }