Close-to-convexity, starlikeness, and convexity of certain analytic functions. - Shigeyoshi Owa; Mamoru Nunokawa; Hitoshi Saitoh; Hari M. Srivastava (Appl. Math. Lett., 2002)

Geometric properties of solutions of a class of ordinary linear differential equations. - Hitoshi Saitoh (Appl. Math. Comput., 2007)

On Certain Multivalent Functions. - Mamoru Nunokawa; Shigeyoshi Owa; Tadayuki Sekine; Rikuo Yamakawa; Hitoshi Saitoh; Junichi Nishiwaki (Int. J. Math. Math. Sci., 2007)

Differential inequalities for certain analytic functions. - Mamoru Nunokawa; Nak Eun Cho; Oh Sang Kwon; Shigeyoshi Owa; Hitoshi Saitoh (Comput. Math. Appl., 2008)