@article{abdalla_cruz-landim_2004,  title={Occurrence and ultrastructural characterization of "nuage" during oogenesis and early spermatogenesis of Piaractus mesopotamicus Holmberg, 1887 (Teleostei)},  volume={64},  ISSN={1519-6984},  url={https://doi.org/10.1590/S1519-69842004000400002},  DOI={10.1590/S1519-69842004000400002},  number={3b},  journal={Brazilian Journal of Biology},  publisher={Instituto Internacional de Ecologia},  author={Abdalla, F. C. and Cruz-Landim, C.},  year={2004},  month={Aug},  pages={555–561} }