Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kazuhito Hatta and Kohei Kodaira and Shigeki Otani and Yoshio Ishizawa and Mikio Higuchi,"High temperature microhardness of Zr-, Sc- and Al-doped rutile crystals",Journal of Alloys and Compounds,0925-8388,Elsevier BV,1994-12-01,216,,L17-L19,https://cir.nii.ac.jp/crid/1870865118286550016,https://doi.org/10.1016/0925-8388(94)91030-8