@article{heinrich1983size,
  title={Size and caste in temperature regulation by bumblebees},
  author={Bernd Heinrich and Margaret (Maggie) Eppstein},
  journal={Physiological Zoology},
  volume={56},
  number={4},
  pages={552-562},
  journalpage={http://www.jstor.org/stable/30155878},
  year={1983},
  citations={}
}