TY  - JOUR 
T1  - Effects of layering technique on the shade of resin overlays and the microhardness of dual cure resin cement
JO  - Brazilian Oral Research
A1  - Chang, Hoon-Sang
A1  - Hong, Sung-Ok
SN  - 1806-8324
UL  - 10.1590/1807-3107BOR-2014.vol28.0016
VL  - 28 
Y1  - 2014
PB  - Brasil 
ER  -