Structure of regular semigroups with a quasi-ideal inverse transversal. T. Saito — 1985 Semigroup forum
Relationship between the inverse transversals of a regular semigroup. T. Saito — 1986 Semigroup forum
Products of four idempotents in finite full transformation semigroups. T. Saito — 1989 Semigroup forum
Remarks on isomorphisms of regressive transformation semigroups. T. Saitô; K. Kajitori; K. Aoki — 1996 Semigroup forum
Strongly compatible total orders on free monoids. Y. Kobayashi; T. Saito; T. Iwamoto; K. Kajitori — 1991 Semigroup forum