Authors DOI: https://doi.org/10.1590/S0034-89101993000400013 Downloads PDF (Portuguese) Published 1993-08-01 Issue Vol. 27 No. 4 (1993) Section Letters to the editor How to Cite (1993). Revista De Saúde Pública, 27(4), 311-312. https://doi.org/10.1590/S0034-89101993000400013 More Citation Formats ACM ACS APA ABNT Chicago Harvard IEEE MLA Turabian Vancouver AMA Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX