TY  - JOUR
AU  - M.S. Putcha
TI  - Viewing results on ...-indecomposable semigroups as solutions to mathematical puzzles.
JO  - Semigroup forum
PY  - 1974
SP  - 181
EP  - 183
VL  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1974__9_134073/
ID  - SF_1974__9_134073
ER  -