Figueiredo, G.C.A.L. de and Figueiredo, E.C.Q. de 2000. Dystrophic calcinosis in a child with a thumb sucking habit: case report . Revista do Hospital das Clínicas. 55, 5 (Oct. 2000), 177–180. DOI:https://doi.org/10.1590/S0041-87812000000500004.