TY  - JOUR
AU  - J.E. McMorris
TI  - The topological structure of planar closed spirals which support clans.
JO  - Semigroup forum
PY  - 1976
SP  - 115
EP  - 118
VL  - 13
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1976__13_134202/
ID  - SF_1976__13_134202
ER  -