Social Informatics … Software Engineering

Bayerisches Landesamt für Steuern (Hg.). ELSTER Ihr Online-Finanzamt [Internet]. [cited 2018 Jul 14].  Available from: https://www.elster.de/  (Blog 14 Jul 2018)

Nielsen J. Usability engineering. San Diego, Academic Press 1993. Reprint: Amsterdam, Kaufmann 2010. (Blog 14 Jul 2018)

Nielsen J. Usability 101: Introduction to Usability [Internet]. [cited 2018 Jul 14]. Available from: https://www.nngroup.com/articles/usability-101-introduction-to-usability/  (Blog 14 Jul 2018)

Wikipedia. Elster (Software) -- in: Wikipedia: Die freie Enzyklopädie. Bearbeitungsstand: 29. Mai 2018, 16:08 UTC. [Internet]. [cited 2018 Jul 14]. Available from: https://de.wikipedia.org/w/index.php?title=Elster_(Software)&oldid=177855536  (Blog 14 Jul 2018)