Man-Machine Interfaces for Software Development Environments (HandS). - Eiji Kuwana; Hironobu Nagano; Yuzou Nakamura (USENIX Winter, 1988)

Design Specification in Japan: Tree-Structured Charts. - Mikio Aoyama; Kazuyasu Miyamoto; Noritoshi Murakami; Hironobu Nagano; Yoshihiro Oki (IEEE Softw., 1989)