Stratmann, A., Fröhlich, E. K. F., Harlander-Matauschek, A., Schrader, L., Toscano, M. J., Würbel, H., & Gebhardt-Henrich, S. G. (2015). Soft Perches in an Aviary System Reduce Incidence of Keel Bone Damage in Laying Hens. PLoS One.

Stratmann, Ariane, Ernst K. F. Fröhlich, Alexandra Harlander-Matauschek, Lars Schrader, Michael J. Toscano, Hanno Würbel, and Sabine G. Gebhardt-Henrich. "Soft Perches in an Aviary System Reduce Incidence of Keel Bone Damage in Laying Hens." PLoS One 2015.

Stratmann, Ariane, et al. "Soft Perches in an Aviary System Reduce Incidence of Keel Bone Damage in Laying Hens." PLoS One 2015.