@article{rodrigues_lobato_santana_meguins_rolo_2008,  title={Pneumoperitoneum due to perforated appendicitis: a rare anatomo-radiologic correlation},  volume={21},  ISSN={0102-6720},  url={https://doi.org/10.1590/S0102-67202008000300011},  DOI={10.1590/S0102-67202008000300011},  number={3},  journal={ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo)},  publisher={Colégio Brasileiro de Cirurgia Digestiva},  author={Rodrigues, André Luiz Santos and Lobato, Marcelino Ferreira and Santana, Augusto César and Meguins, Lucas Crociati and Rolo, Daniel Felgueiras},  year={2008},  month={Jul},  pages={142–143} }