Exact stability criteria for delay differential and difference equations. - Hideaki Matsunaga (Appl. Math. Lett., 2007)

Stability switches in a system of linear differential equations with diagonal delay. - Hideaki Matsunaga (Appl. Math. Comput., 2009)

Effect of off-diagonal delay on the asymptotic stability for an integro-differential system. - Hideaki Matsunaga; Masakatsu Suzuki (Appl. Math. Lett., 2012)

Classification of global behavior of a system of rational difference equations. - Hideaki Matsunaga; Rina Suzuki (Appl. Math. Lett., 2018)