@article{pizarro_noll_mateus_2009,  title={Caste differences in Pseudopolybia compressa (Hymenoptera: Vespidae: Polistinae)},  volume={26},  ISSN={1984-4670},  url={https://doi.org/10.1590/S1984-46702009000400006},  DOI={10.1590/S1984-46702009000400006},  number={4},  journal={Zoologia (Curitiba)},  publisher={Sociedade Brasileira de Zoologia},  author={Pizarro, Laura Chavarría and Noll, Fernando B. and Mateus, Sidnei},  year={2009},  month={Dec},  pages={624–628} }