TY  - JOUR
AU  - Sasaki, Morio
AU  - Tamura, Takayuki
TI  - Positive rational semigroups and commutative power joined cancellative semigroups without idempotent
JO  - Czechoslovak Mathematical Journal
PY  - 1971
SP  - 567
EP  - 576
VL  - 21
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1971.101056/
DO  - 10.21136/CMJ.1971.101056
LA  - en
ID  - 10_21136_CMJ_1971_101056
ER  -