Low-shrinkage visible-light-curable urethane-modified epoxy acrylate/SiO2 composites as dental restorative materials - Chen, Chia-Yin; Huang, Chih-Kai; Lin, Shih-Pin; Han, Jin-Lin; Hsieh, Kuo-Huang; Lin, Chun-Pin (Composites Science & Technology, 2008)