TY  - JOUR
AU  - Abramson, M.
TI  - Restricted Choices
JO  - Canadian mathematical bulletin
PY  - 1965
SP  - 585
EP  - 600
VL  - 8
IS  - 5
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1965-042-4/
DO  - 10.4153/CMB-1965-042-4
ID  - 10_4153_CMB_1965_042_4
ER  -