Rellich, Franz.
Perturbation Theory of Eigenvalue Problems / - 1st ed / - New York-11 : Gordon & Breach Science Publishers Inc.. - p.119 :
Perturbation Theory
B3 / K9R
Perturbation Theory of Eigenvalue Problems / - 1st ed / - New York-11 : Gordon & Breach Science Publishers Inc.. - p.119 :
Perturbation Theory
B3 / K9R