The effect of firing times on the chroma of tetragonal zirconia polycrystal by adding rare -earth oxides
GAO Yan1，2, ZHANG Fu-qiang1，2, HUANG Hui1，2, GUI Lin-hua3
West China Journal of Stomatology . 2010, (05): 484 -487 .  DOI: 10.3969/j.issn.1000-1182.2010.05.007

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