User-eXperience (UX) meets Return-on-Investment (RoI). - Elena Gocheva; Katharina Göring; Andreas Hinderks; Boris Kneisel; Christine Krämer; Oliver Siegmund (UP, 2012)

Arbeitskreis ROI: Return-on-User-eXperience in a Nutshell. - Boris Kneisel; Katharina Göring (UP, 2013)