@techreport{JW111999,
            author = {J. Gerlach, W. Rosenstiel},
            title = {Ein modularer Ansatz zur Transformationssteuerung},
            institution = {WSI-99-20, Wilhelm-Schickard-Institut für Informatik},
            year = {1999},
            month = {11},
            address = {Universität Tübingen}
}