@article{gazola_borella_1997,  title={Plasma testosterone and 11-ketotestosterone levels of male pacu Piaractus mesopotamicus (Cypriniformes, Characidae)},  volume={30},  ISSN={0100-879X},  url={https://doi.org/10.1590/S0100-879X1997001200017},  DOI={10.1590/S0100-879X1997001200017},  number={12},  journal={Brazilian Journal of Medical and Biological Research},  publisher={Associação Brasileira de Divulgação Científica},  author={Gazola, R. and Borella, M.I.},  year={1997},  month={Dec},  pages={1485–1487} }