[2020]. ‘Characteristic polynomials and zeta functions of equitably partitioned graphs’
Linear Algebra and its Applications
Volume 588, 1 March 2020, Pages 471-488
[1999] ‘Strong ergodic theorems for commutative semigroups of operators’
May 1999 Proceedings of the American Mathematical Society 127 (10)
https://www.researchgate.net/publication/252394332_Strong_ergodic_theorems_for_commutative_semigroups_of_operators
[1999] ‘Existence of ergodic retraction for noncommutative semigroups in Banach spaces’ Proceedings of the American Mathematical Society,
May 1999, 127(10)
https://www.researchgate.net/publication/254467358_Existence_of_ergodic_retraction_for_noncommutative_semigroups_in_Banach_spaces
[1999] “Strong ergodic theorems for commutative semigroups of operators, “Proceedings of the American Mathematical Society 127 (1999), 3003-3011. American Mathematical Society 127 (1999), 3003-3011.
[1997] With Takahashi, W., ‘Strong convergence and nonlinear ergodic theorems for commutative semigroupsof nonexpansivemappings,’ NonlinearAnalysis 28 (1997),495-511.
[1997] With Lau, A. T. and Takahashi, W., ‘Asymptotically invariant net and fixed point set for semigroup of nonexpansive mappings, Nonlinear Analysis 29 (1997), 539-550.
[1996] ‘Weak and strong convergence theorems in nonlinear ergodic theorems (in Japanese),’ RIMS Kokyuroku 939 (1996), 183-197.
[1996] with Suzuki, T. and Takahashi, W., ‘Nonconvex minimization theorems and fixed point theorems in complete metric spaces, ‘ Math. Japonica 44 (1996), 381-391.
[1995] With Takahashi, W., ‘Nonlinear ergodic theorems for almost nonexpansive curves over commutative semigroups,’ Topological Methods in Nonlinear Analysis 5 (1995), 305-324.