@article{imbelloni_vieira_carneiro_2012,  title={Postoperative analgesia for hemorrhoidectomy with bilateral pudendal blockade on an ambulatory patient: a controlled clinical study},  volume={32},  ISSN={2237-9363},  url={https://doi.org/10.1590/S2237-93632012000300012},  DOI={10.1590/S2237-93632012000300012},  number={3},  journal={Journal of Coloproctology (Rio de Janeiro)},  publisher={Sociedade Brasileira de Coloproctologia},  author={Imbelloni, Luiz Eduardo and Vieira, Eneida Maria and Carneiro, Antonio Fernando},  year={2012},  month={Jul},  pages={291–296} }