TY  - JOUR
AU  - Schwerdtfeger, H.
TI  - On the Discriminant x'Ax.y'Ay-(x'Ay)2
JO  - Canadian mathematical bulletin
PY  - 1958
SP  - 175
EP  - 179
VL  - 1
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1958-018-0/
DO  - 10.4153/CMB-1958-018-0
ID  - 10_4153_CMB_1958_018_0
ER  -