A Simple Characterization of Fuzzy Subgroups. - Takashi Kuraoka; Nobu-Yuki Suzuki (Inf. Sci., 1993)

Optimal Fuzzy Objects for the Set of Given Data in the Case of the Group Theory. - Takashi Kuraoka; Nobu-Yuki Suzuki (Inf. Sci., 1996)

Formulas on the lattice of fuzzy subalgebras in universal algebra. - Takashi Kuraoka (Fuzzy Sets Syst., 2007)

Tensor products of semilattices and fuzzy ideals. - Takashi Kuraoka (Fuzzy Sets Syst., 2016)