TY  - JOUR
AU  - Marvin Marcus
TI  - Pencils of real symmetric matrices and the numerical range. (Short Communication).
JO  - Aequationes mathematicae
PY  - 1977
SP  - 193
EP  - 193
VL  - 16
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1977__16_136693/
ID  - AM2_1977__16_136693
ER  -