Teruo Yaguchi

Notes on certain class of analytic functions with negative coefficients

Tadayuki Sekine, Mamoru Nunokawa, Shigeyoshi Owa, 1989 .

A generalization class of certain subclasses of $P$-valenty analytic functions with negative coefficients

Nak Eun Cho, Oh Sang Kwon, Rikuo Yamakawa, 1993 .