Graziano, Kazuko Uchikawa, and Luciene Figueiredo. “Paraformaldehyde Tablets Microbiological Activity Reproducing the Use Conditions of the Brazilian Health Institutions”. Revista Da Escola De Enfermagem Da USP, vol. 37, no. 1, Mar. 2003, pp. 90-96, https://doi.org/10.1590/S0080-62342003000100011.