@article{BarlovitsJablonskiLazaroetal.2021,
  author    = {Simon Barlovits and Simone Jablonski and Claudia L{\´a}zaro and Matthias Ludwig and Tomas Recio},
  title     = {Teaching from a distance - math lessons during COVID-19 in Germany and Spain},
  journal   = {Education sciences},
  volume    = {11},
  number    = {8, art. 406},
  pages     = {1 -- 17},
  doi       = {10.3390/educsci11080406},
  year      = {2021},
}