Hayashi, Andrea Mayumi Loureiro, et al. “The Use of the Contraceptive Method of Barrier in the Prevention of Sexually Transmissible Illnesses in the City of São Paulo”. ConScientiae Saúde, vol. 6, no. 1, Apr. 2008, pp. 111-6, doi:10.5585/conssaude.v6i1.917.