@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/