Uniform asymptotic stability for damped linear oscillators with variable parameters. - Masakazu Onitsuka (Appl. Math. Comput., 2011)

Hyers-Ulam stability of first-order homogeneous linear differential equations with a real-valued coefficient. - Masakazu Onitsuka; Tomohiro Shoji (Appl. Math. Lett., 2017)

Hyers-Ulam stability of first-order nonhomogeneous linear difference equations with a constant stepsize. - Masakazu Onitsuka (Appl. Math. Comput., 2018)

Hyers-Ulam stability for a discrete time scale with two step sizes. - Douglas R. Anderson; Masakazu Onitsuka (Appl. Math. Comput., 2019)

Hyers-Ulam stability of first order linear differential equations of Carathéodory type and its application. - Masakazu Onitsuka (Appl. Math. Lett., 2019)

Ulam Stability for a Class of Hill's Equations. - Ryuma Fukutaka; Masakazu Onitsuka (Symmetry, 2019)

A necessary and sufficient condition for Hyers-Ulam stability of first-order periodic linear differential equations. - Ryuma Fukutaka; Masakazu Onitsuka (Appl. Math. Lett., 2020)

Conditional Ulam stability and its application to the logistic model. - Masakazu Onitsuka (Appl. Math. Lett., 2021)

On approximate solutions of a class of Clairaut's equations. - Masakazu Onitsuka; Iz-iddine El-Fassi (Appl. Math. Comput., 2022)

Leighton-Wintner-type oscillation theorem for the discrete p(k)-Laplacian. - Kodai Fujimoto; Kazuki Ishibashi; Masakazu Onitsuka (Appl. Math. Lett., 2025)