Color and opacity of composites protected with surface sealants and submitted to artificial accelerated aging - Aguilar, Fabiano Gamero; Garcia, Lucas da Fonseca Roberti; Cruvinel, Diogo Rodrigues; Sousa, Ana Beatriz Silva; Pires-de-Souza, Fernanda de Carvalho Panzeri (European Journal of Dentistry, 2012)