@article{sierra madero_2012,  title={Walls talk: homoerotic networks and sexual graffiti in public washrooms in Havana},  ISSN={1984-6487},  url={https://doi.org/10.1590/S1984-64872012000600002},  DOI={10.1590/S1984-64872012000600002},  number={12},  journal={Sexualidad, Salud y Sociedad (Rio de Janeiro)},  publisher={Centro Latino-Americano em Sexualidade e Direitos Humanos (CLAM/IMS/UERJ)},  author={Sierra Madero, Abel},  year={2012},  month={Dec},  pages={13–36} }