JIANG Ming-xin, HUANG Ke-qiang, LI Zhi-gang, GAO Xiu-qiu, LI Chun-shan. A comparative study of marginal microleakage using different cements in porcelain-fused-to-metal crown[J]. West China Journal of Stomatology, doi: 10.3969/j.issn.1000-1182.2011.02.016.