@article{KeemssSielandPfabetal.2022,
  author    = {Jil Keemss and Johanna Sieland and Florian Pfab and Winfried Banzer},
  title     = {Effects of COVID-19 lockdown on physical performance, sleep quality, and health-related quality of life in professional youth soccer players},
  journal   = {Frontiers in sports and active living},
  volume    = {4},
  number    = {art. 875767},
  pages     = {1 -- 13},
  doi       = {10.3389/fspor.2022.875767},
  year      = {2022},
}