@article{HambrechtOerkeHeistermannetal.2021,
  author    = {Susan Hambrecht and Ann-Kathrin Oerke and Michael Heistermann and Johannes Hartig and Paul W. Dierkes},
  title     = {Effects of positive reinforcement training and novel object exposure on salivary cortisol levels under consideration of individual variation in captive African elephants (Loxodonta africana)},
  journal   = {Animals},
  volume    = {11},
  number    = {12, art. 3525},
  pages     = {1 -- 24},
  doi       = {10.3390/ani11123525},
  year      = {2021},
}