Knowledge Representation of New HELIC II. - Katsumi Nitta; Masato Shibasaki; Tsuyoshi Sakata; Takahiro Yamaji; Hiroshi Ohsaki; Satoshi Tojo; Iwao Kokubo; T. Anu Suzuki (ICLP Workshop: Legal Application of Logic Programming, 1994)

New HELIC-II: A Software Tool for Legal Eeasoning. - Katsumi Nitta; Masato Shibasaki; Tsuyoshi Sakata; Takahiro Yamaji; Wang Xianchang; Hiroshi Ohsaki; Satoshi Tojo; Iwao Kokubo; T. Anu Suzuki (ICAIL, 1995)

Defeasible Reasoning in Japanese Criminal Jurisprudence. - Katsumi Nitta; Masato Shibasaki (Artif. Intell. Law, 1997)

A Framework for Nonmonotonic Reasoning with Rule Priorities. - Masato Shibasaki; Katsumi Nitta (J. Adv. Comput. Intell. Intell. Informatics, 1998)

A legal negotiation support system. - Katsumi Nitta; Masato Shibasaki; Akira Yamazaki; Yoshiaki Yasumura (ICAIL, 1999)