@techreport{manche1994rolle, address = {Berlin}, author = {Simon, K.-H. and Manche, A. and Uhrmacher, A.}, institution = {Umweltbundesamt}, interhash = {07b42462ae946c55fe7d2559bacdba28}, intrahash = {f0620f1828b7bbe111cbcbaeba8a70c4}, pages = 135, publisher = {Umweltbundesamt}, title = {Expertensysteme auf dem Umweltsektor}, type = {Studie}, year = 1992 }