@article{GDZPPN001182773,
title = {An a posteriori Error Estimation of the Rayleigh-Ritz Eigenvalues.},
journal = {Numerische Mathematik},
volume = {56},
year = {1989},
pages = {639-654},
zbl = {0645.65027},
url = {http://dml.mathdoc.fr/item/GDZPPN001182773}
}
Zitnan, Peter. An a posteriori Error Estimation of the Rayleigh-Ritz Eigenvalues.. Numerische Mathematik, Tome 56 (1989) pp. 639-654. http://gdmltest.u-ga.fr/item/GDZPPN001182773/