@article{machado_alves_gomes_torriani_2012,  title={Keratoacanthoma in the cutaneous area of the upper lip: a case report},  volume={27},  ISSN={1980-6523},  url={https://doi.org/10.1590/S1980-65232012000300013},  DOI={10.1590/S1980-65232012000300013},  number={3},  journal={Revista Odonto Ciência},  publisher={Pontifícia Universidade Católica do Rio Grande do Sul},  author={Machado, Heloisa Har and Alves, Alessandro Menna and Gomes, Ana Paula Neutzling and Torriani, Marcos Antonio},  year={2012},  pages={242–245} }