@article{silva_azevedo_silveira_2011,  title={Social wasps of two Cerrado localities in the northeast of Maranhão state, Brazil (Hymenoptera, Vespidae, Polistinae)},  volume={55},  ISSN={0085-5626},  url={https://doi.org/10.1590/S0085-56262011000400017},  DOI={10.1590/S0085-56262011000400017},  number={4},  journal={Revista Brasileira de Entomologia},  publisher={Sociedade Brasileira De Entomologia},  author={Silva, Suzanna de Sousa and Azevedo, Gisele Garcia and Silveira, Orlando Tobias},  year={2011},  month={Oct},  pages={597–602} }