TY  - JOUR
AU  - Stein, Sherman K.
TI  - The Cardinalities of A+A and A-A
JO  - Canadian mathematical bulletin
PY  - 1973
SP  - 343
EP  - 345
VL  - 16
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-055-6/
DO  - 10.4153/CMB-1973-055-6
ID  - 10_4153_CMB_1973_055_6
ER  -