@techreport{GroetschelDalitzWinczewski1998, author = {Martin Gr{\"o}tschel and Wolfgang Dalitz and Vincent Winczewski}, title = {Math-Net: Ein Informationssystem der Mathematik}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-98-25}, language = {deu}, year = {1998} }