@article{Keller2021,
author = {Keller, Jan and Roitzheim, Christina and Radtke, Theda and Schenkel, Konstantin and Schwarzer, Ralf},
year = {2021},
language = {eng},
copyright = {https://creativecommons.org/licenses/by/4.0/},
title = {A Mobile Intervention for Self-Efficacious and Goal-Directed Smartphone Use in the General Population: Randomized Controlled Trial},
volume = {9},
url = "http://dx.doi.org/10.17169/refubium-32785",
}