Authors DOI: https://doi.org/10.1590/S0034-89101991000100014 Downloads PDF (Portuguese) Published 1991-02-01 Issue Vol. 25 No. 1 (1991) Section Letters to the editor How to Cite (1991). Revista De Saúde Pública, 25(1), 72-73. https://doi.org/10.1590/S0034-89101991000100014 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver AMA Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX