TY  - JOUR
AU  - V. V. Ishkhanov
TI  - Positivity of the principal minors of a nonsingular $M$-matrix
JO  - Zapiski Nauchnykh Seminarov POMI
PY  - 1981
SP  - 88
VL  - 111
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/ZNSL_1981_111_a4/
LA  - ru
ID  - ZNSL_1981_111_a4
ER  -