@article{abessa_rachid_sousa_2001,  title={Preliminary results in the sexual dimorphism determination of the sea urchin Lytechinus variegatus variegatus (Lamarck, 1816), Echinoidea, Toxopneustidae},  volume={49},  ISSN={1413-7739},  url={https://doi.org/10.1590/S1413-77392001000100011},  DOI={10.1590/S1413-77392001000100011},  number={1-2},  journal={Revista Brasileira de Oceanografia},  publisher={Instituto Oceanográfico da Universidade de São Paulo},  author={Abessa, Denis M. S. and Rachid, Bauer R. F. and Sousa, Eduinetty Ceci Pereira M.},  year={2001},  pages={133–135} }