@techreport{ShinanoRehfeldtKoch2018, author = {Yuji Shinano and Daniel Rehfeldt and Thorsten Koch}, title = {Building Optimal Steiner Trees on Supercomputers by using up to 43,000 Cores}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {18-58}, language = {eng}, year = {2018} }