P. Froes Meyer, O. Ariel Ronzio, A. de Souza da Fonseca, S. D. Santos-Filho, and M. Bernardo-Filho, “Cellular and molecular effects of electromagnetic radiation and sonic waves”, S. Afr. J. Sci., vol. 109, no. 7/8, p. 4, Jul. 2013, doi: 10.1590/sajs.2013/20130005.