@techreport{BertholdGleixner2012, author = {Timo Berthold and Ambros Gleixner}, title = {Undercover: a primal MINLP heuristic exploring a largest sub-MIP}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {12-07}, language = {eng}, year = {2012} }