Synchrotron X-Ray Study of the Crystal Structure and Hydrothermal Degradation of Yttria-Stabilized Tetragonal Zirconia Polycrystal. - Yamashita, Isao; Tsukuma, Koji; Tojo, Takeo; Kawaji, Hitoshi; Atake, Tooru (Journal of the American Ceramic Society, 2008)