TY  - JOUR
AU  - J.E. Mills
TI  - The inverse semigroup of partial symmetries of a convex polygon.
JO  - Semigroup forum
PY  - 1990
SP  - 127
EP  - 144
VL  - 41
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1990__41_2_135042/
ID  - SF_1990__41_2_135042
ER  -