[2] A. H. Clifford, G. B. Preston:
The algebraic theory of semigroups. Vol. I. Amer. Math. Soc., Providence, R. I., 1961.
MR 0132791 |
Zbl 0111.03403
[3] B. Pondělíček:
Archimedean equivalence on ordered semigroups. Czechoslovak Math. J. 22 (97) (1972), 210-219.
MR 0294200
[6] T. Saitô:
Note on the archimedean property in an ordered semigroup. Proc. Japan Acad. 46 (1970), 64-65.
MR 0262135
[7] T. Saitô:
Note on the archimedean property in an ordered semigroup. Bull. Tokyo Gakugei Univ. Ser. IV, 22 (1970), 8-12.
MR 0268102
[8] T. Saitô:
Elements of finite order in an ordered semigroup whose product is of infinite order. Proc. Japan Acad. 50 (1974), 268-270.
MR 0360401
[9] T. Saitô:
Archimedean classes in a nonnegatively ordered semigroup. to appear.
MR 0682004