A. G. Rodrigues, M. A. W. B. Viveiros, I. M. O. Barroso, A. P. Cavalcante, and A. M. Q. Lopez, “Bacterial contamination in computers keyboards used in university hospital of northeastern Brazil”, Medicina (Ribeirão Preto), vol. 45, no. 1, pp. 39–48, Mar. 2012, doi: 10.11606/issn.2176-7262.v45i1p39-48.