TY  - JOUR
AU  - K.D. jr. Magill
AU  - P.R. Misra
TI  - Principal continuum congruences, regular ...-classes and local subsemigroups.
JO  - Semigroup forum
PY  - 1990
SP  - 205
EP  - 226
VL  - 40
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1990__40_1_135020/
ID  - SF_1990__40_1_135020
ER  -