TY  - JOUR
AU  - R. Grübel
TI  - A Minimal Characterization of the Covariance Matrix.
JO  - Metrika
PY  - 1988
SP  - 49
EP  - 52
VL  - 35
IS  - 3-4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MET_1988__35_3-4_176152/
ID  - MET_1988__35_3-4_176152
ER  -