On the Structure of Linear Semigroups. - Jin Bai Kim (J. Comb. Theory A, 1971)

Idempotents in Symmetric Semigroups. - Jin Bai Kim (J. Comb. Theory A, 1972)

On Fuzzy Idenpotent Matrices of T-Type. - Jin Bai Kim (Inf. Sci., 1994)

Fuzzy symmetric groups. - Jin Bai Kim; Young Hee Kim (Fuzzy Sets Syst., 1996)