Open Source für europäische Signaturen. - Moritz Horsch; David Derler; Christof Rath; Hans-Martin Haase; Tobias Wich (Datenschutz und Datensicherheit, 2014)

The evolution of identity management using the example of web-based applications. - Detlef Hühnlein; Tobias Wich; Johannes Schmölz; Hans-Martin Haase (it Inf. Technol., 2014)

Quality management in open source projects - experiences from the open ecard project. - Daniel Nemmert; Hans-Martin Haase; Detlef Hühnlein; Tobias Wich (Open Identity Summit, 2015)