Resolving Incompatibility During the Evolution of Web Services With Message Conversion. - Vadym Borovskiy; Alexander Zeier; Jan Karstens; Heinz Ulrich Roggenkemper (ICSOFT (SE/MUSE/GSDCA), 2008)

A case study of API redesign for improved usability. - Jeffrey Stylos; Benjamin Graf; Daniela K. Busse; Carsten Ziegler; Ralf Ehret; Jan Karstens (VL/HCC, 2008)

Improving Documentation for eSOA APIs through User Studies. - Sae Young Jeong; Yingyu Xie; Jack Beaton; Brad A. Myers; Jeffrey Stylos; Ralf Ehret; Jan Karstens; Arkin Efeoglu; Daniela K. Busse (IS-EUD, 2009)

Studying the Documentation of an API for Enterprise Service-Oriented Architecture. - Brad A. Myers; Sae Young Jeong; Yingyu Xie; Jack Beaton; Jeffrey Stylos; Ralf Ehret; Jan Karstens; Arkin Efeoglu; Daniela K. Busse (J. Organ. End User Comput., 2010)

Precise and Scalable Querying of Syntactical Source Code Patterns Using Sample Code Snippets and a Database. - Oleksandr Panchenko; Jan Karstens; Hasso Plattner; Alexander Zeier (ICPC, 2011)