@article{carvalho_haddad_leonhardt_marques filho_santos_cervantes_abrahão_2004,  title={Head and neck hemangiopericytoma in a child: case report},  volume={122},  ISSN={1516-3180},  url={https://doi.org/10.1590/S1516-31802004000500010},  DOI={10.1590/S1516-31802004000500010},  number={5},  journal={Sao Paulo Medical Journal},  publisher={Associação Paulista de Medicina - APM},  author={Carvalho, Jomar Rezende and Haddad, Leonardo and Leonhardt, Fernando Danelon and Marques Filho, Marcílio Ferreira and Santos, Rodrigo de Oliveira and Cervantes, Onivaldo and Abrahão, Márcio},  year={2004},  pages={223–226} }