The German Version of the Mobile App Rating Scale (MARS-G): Development and Validation Study - Messner, E; Terhorst, Y; Barke, A; Baumeister, H; Stoyanov, S; Hides, L; Kavanagh, D; Pryss, R; Sander, L; Probst, T (JMIR Mhealth Uhealth, 2020)