TY  - JOUR
AU  - Berlekamp, E.R.
TI  - On Subsets with Intersections of Even Cardinality
JO  - Canadian mathematical bulletin
PY  - 1969
SP  - 471
EP  - 474
VL  - 12
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-059-3/
DO  - 10.4153/CMB-1969-059-3
ID  - 10_4153_CMB_1969_059_3
ER  -