@article{FuezekiSchroederReeretal.2021,
  author    = {Eszter F{\"u}z{\´e}ki and Jan Schr{\"o}der and R{\"u}diger Reer and Jan David Alexander Groneberg and Winfried Banzer},
  title     = {Physical activity and well-being during the second COVID19-related lockdown in Germany in 2021},
  journal   = {Sustainability},
  volume    = {13},
  number    = {21, art. 12172},
  pages     = {1 -- 14},
  doi       = {10.3390/su132112172},
  year      = {2021},
}