TY  - JOUR
AU  - Wallace, A. D.
TI  - Relative invertibility in semigroups
JO  - Czechoslovak Mathematical Journal
PY  - 1961
SP  - 480
EP  - 482
VL  - 11
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1961.100475/
DO  - 10.21136/CMJ.1961.100475
LA  - en
ID  - 10_21136_CMJ_1961_100475
ER  -