A modeling approach to a JIT-based ordering system. - Norio Watanabe; Shusaku Hiraki (Ann. Oper. Res., 1997)

Fuzzy K-Means Clustering With Crisp Regions. - Norio Watanabe; Tadashi Imaizuimi (FUZZ-IEEE, 2001)

Fuzzy modeling by hyperbolic fuzzy k-means clustering. - Norio Watanabe (FUZZ-IEEE, 2002)

Fuzziness indices for fuzzy clustering. - Norio Watanabe (FUZZ-IEEE, 2003)