M. Weber, M. G. Baladi, E. S. Arita, and D. S. Haddad, “Comparative spectrophotometric study of the color stability of three dental porcelains after repeated fi rings”, Clin Lab Res Dent, vol. 20, no. 3, pp. 174–180, Sep. 2014, doi: 10.11606/issn.2357-8041.clrd.2014.56875.