@article{GDZPPN001165267,
title = {Positive Operators and an Inertia Theorem.},
journal = {Numerische Mathematik},
volume = {7},
year = {1965},
pages = {11-17},
zbl = {0158.28003},
url = {http://dml.mathdoc.fr/item/GDZPPN001165267}
}
SCHNEIDER, H. Positive Operators and an Inertia Theorem.. Numerische Mathematik, Tome 7 (1965) pp. 11-17. http://gdmltest.u-ga.fr/item/GDZPPN001165267/