A. C. de L. T. Massoni, M. C. A. Silva, M. de F. Perazzo, R. V. S. Pereira, C. P. Pessoa, and A. F. Granville-Garcia, “Physical conditions and conditioning of toothbrushes for preschool children”, Arq Odontol, vol. 51, no. 2, Jun. 2016.