@misc{LehnerSikora2017, author = {Franz Lehner and Hermann Sikora}, title = {Wartung objektorientierter Softwaresysteme}, volume = {1993}, institution = {Lehrstuhl f{\"u}r Wirtschaftsinformatik und Informationsmanagement}, series = {WHU-Forschungspapier}, number = {019}, type = {workingpaper}, pages = {37}, year = {2017}, }