T. Sudo. The algebraic and geometric classification of generically non-degenerate projections of matrix algebras over complex numbers. Bulletin of the Faculty of Science, Univ. Ryukyus. 2019. 107. 1-31
T. Sudo. A locally commentative, deformative learning in the arithmetic noncommutative geometry as flower gardening variation. Ryukyu Math. J. 2018. 31. 7-164
T. Sudo. The spectrum theory for weighted shift operators and their C*-algebras. Bulletin of the Faculty of Science, Univ. Ryukyus,. 2018. 106. 1-31
T. Sudo. Explicit computing the real or complex operator norms for matrices. Bulletin of the Faculty of Science, Univ. Ryukyus. 2018. 105. 1-30
T. Sudo. The K-theory for the group and subgroup C*-algebras of special or general linear groups over integers. Sci. Math. Japon. 2018. 81. 1. 47-63