@book{KoenigWernerSchulleretal.2022,
  author    = {Walter K{\"o}nig and Werner Werner and Erich Schuller and Gundolf Beier and Wolfgang Spann},
  title     = {Kriterien f{\"u}r die Pr{\"u}fung von Motorradschutzhelmen},
  isbn      = {3-89429-376-4},
  year      = {2022},
}