@article{02220739, title = {Pseudoinverse formulation of Rayleigh-Schr\"odinger perturbation theory for the symmetric matrix eigenvalue problem.}, journal = {Journal of Applied Mathematics}, volume = {2003}, year = {2003}, pages = {459-485}, doi = {10.1155/S1110757X03303092}, zbl = {1081.65514}, language = {en}, url = {http://dml.mathdoc.fr/item/02220739} }
McCartin, Brian J. Pseudoinverse formulation of Rayleigh-Schrödinger perturbation theory for the symmetric matrix eigenvalue problem.. Journal of Applied Mathematics, Tome 2003 (2003) pp. 459-485. doi : 10.1155/S1110757X03303092. http://gdmltest.u-ga.fr/item/02220739/