@article{ZylRothmannZondervanZwijnenburg2021,
  author    = {Llewellyn Ellardus van Zyl and Sebastiaan Rothmann and Maria A. J. Zondervan-Zwijnenburg},
  title     = {Longitudinal trajectories of study characteristics and mental health before and during the COVID-19 lockdown},
  journal   = {Frontiers in psychology},
  volume    = {12},
  number    = {art. 633533},
  pages     = {1 -- 13},
  doi       = {10.3389/fpsyg.2021.633533},
  year      = {2021},
}