@techreport{BleyKochWessaely2004, author = {Andreas Bley and Thorsten Koch and Roland Wess{\"a}ly}, title = {Large-scale hierarchical networks: How to compute an optimal architecture?}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {04-04}, language = {eng}, year = {2004} }