S. T. Fontes, M. R. Fernández, C. M. de Moura, and S. S. Meireles, “ Color stability of a nanofill composite: effect of different immersion media ”, J Appl Oral Sci, vol. 17, no. 5, pp. 388–391, Oct. 2009, doi: 10.1590/S1678-77572009000500007.