TY  - JOUR
AU  - Magill, Kenneth D.
TI  - Homomorphisms from S(X) into S(Y)
JO  - Canadian journal of mathematics
PY  - 1977
SP  - 615
EP  - 625
VL  - 29
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-062-0/
DO  - 10.4153/CJM-1977-062-0
ID  - 10_4153_CJM_1977_062_0
ER  -