Effects of surface treatments and cement types on the shear strength of zirconia 
Shao Long-quan1, Hu Chen1, Sun Ting1, Liu Xiao-fang2, Wen Ning3, Deng Bin3
Chinese Journal of Tissue Engineering Research . 2012, (8): 1435 -1438 .  DOI: 10.3969/j.issn.1673-8225.2012.08.023