@article{marcondes_bianchi_tanno_2002,  title={Determination of the estrous cycle phases of rats: some helpful considerations},  volume={62},  ISSN={1519-6984},  url={https://doi.org/10.1590/S1519-69842002000400008},  DOI={10.1590/S1519-69842002000400008},  number={4a},  journal={Brazilian Journal of Biology},  publisher={Instituto Internacional de Ecologia},  author={MARCONDES, F. K. and BIANCHI, F. J. and TANNO, A. P.},  year={2002},  month={Nov},  pages={609–614} }