Do best practice frameworks fit open source software customization? - Steffen Keßler; Paul Alpar (ECIS, 2009)

Customization of Open Source Software in Companies. - Steffen Keßler; Paul Alpar (OSS, 2009)

Anpassung von Open-Source-Software in Anwenderunternehmen. - Steffen Keßler (Springer Vieweg, 2013)