TY  - JOUR
TI  - Thesis Abstract
JO  - Canadian mathematical bulletin
PY  - 1969
SP  - 544
EP  - 544
VL  - 12
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500030915/
DO  - 10.1017/S0008439500030915
ID  - 10_1017_S0008439500030915
ER  -