@article{KlingelhoeferBraunBrueggmannetal.2021,
  author    = {Doris Klingelh{\"o}fer and Markus Braun and D{\"o}rthe Br{\"u}ggmann and Jan David Alexander Groneberg},
  title     = {The pandemic year 2020: world map of coronavirus research},
  journal   = {Journal of medical internet research},
  volume    = {23},
  number    = {9, art. e30692},
  pages     = {1 -- 16},
  doi       = {10.2196/30692},
  year      = {2021},
}