@book{Scheer.1991, address = {Berlin}, author = {Scheer, August-Wilhelm and Kruse, Christian}, interhash = {85aa53d3fd0e14df164202a0cc51329d}, intrahash = {84ac10d8adb0388afb65cfa563e2717a}, isbn = {3540535608}, publisher = {Springer}, series = {Wirtschaftsinformatik}, title = {Wirtschaftsinformatik}, volume = {Übungsbuch}, year = 1991 }