@article{karasawa_suwa_kimura_1981, 
  title={Voluntary exercise during pregnancy and lactation and its effect on lactational performance in mice.}, 
  volume={27}, 
  DOI={10.3177/jnsv.27.333}, 
  publisher={Center for Academic Publications Japan}, 
  author={KARASAWA and SUWA and KIMURA}, 
  year={1981}
  }