F. Schumacher, S. Klingner, R. Gey, and M. Becker. Services and New Societal Challenges: Innovation for Sustainable Growth and Welfare, page 1248--1255. (2014)
M. Becker, and S. Klingner. Enterprise, Business-Process and Information Systems Modeling, volume 175 of Lecture Notes in Business Information Processing, Springer Berlin Heidelberg, (2014)