Burgfeld-Meise, Bianca, and Lukas Dehmel. 2021. “Subject Knowledge As an Educational Perspective of Young Adults: Self-Tracking-Apps As Digital Optimization Technologies Between Surveillance and Self-Empowerment”. MediaEducation: Journal for Theory and Practice of Media Education 42 (Optimierung): 237-58. https://doi.org/10.21240/mpaed/42/2021.06.21.X.