@article{GDZPPN001177877,
title = {The Perturbation Bounds for Eigenspaces of a Definite Matrix-Pair},
journal = {Numerische Mathematik},
volume = {42},
year = {1983},
pages = {321-344},
zbl = {0487.65021},
url = {http://dml.mathdoc.fr/item/GDZPPN001177877}
}
Sun, J. The Perturbation Bounds for Eigenspaces of a Definite Matrix-Pair. Numerische Mathematik, Tome 42 (1983) pp. 321-344. http://gdmltest.u-ga.fr/item/GDZPPN001177877/