@article{ruszczyk_motta_barros_araújo_2004,  title={Ecological correlates of polyphenism and gregarious roosting in the grass yellow butterfly Eurema elathea (Pieridae)},  volume={64},  ISSN={1519-6984},  url={https://doi.org/10.1590/S1519-69842004000100017},  DOI={10.1590/S1519-69842004000100017},  number={1},  journal={Brazilian Journal of Biology},  publisher={Instituto Internacional de Ecologia},  author={Ruszczyk, A. and Motta, P. C. and Barros, R. L. and Araújo, A. M.},  year={2004},  month={Feb},  pages={151–164} }