@article{Beecken2009,
  author    = {Walter Beecken},
  title     = {{\"U}ber die Putz-und S{\"a}uberungshandlungen der Honigbiene (Apis mellifica)},
  journal   = {Archiv f{\"u}r Bienenkunde},
  volume    = {15},
  pages     = {213 -- 275},
  year      = {2009},
}