TY  - JOUR
AU  - Bressler, D. W.
AU  - Cayford, A. H.
TI  - Compositions of Set Operations
JO  - Canadian journal of mathematics
PY  - 1970
SP  - 227
EP  - 234
VL  - 22
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-029-8/
DO  - 10.4153/CJM-1970-029-8
ID  - 10_4153_CJM_1970_029_8
ER  -