G. C. A. L. de Figueiredo e E. C. Q. de Figueiredo, “ Dystrophic calcinosis in a child with a thumb sucking habit: case report ”, Rev. Hosp. Clín., vol. 55, nº 5, p. 177–180, out. 2000, doi: 10.1590/S0041-87812000000500004.