Direct methods of qualitative spectral analysis of singular differential operators
[by] I.M. Glazman. Translated from Russian by IPST Staff.
Jerusalem : Israel Program for Scientific Translations, 1965.
ix, 234 págs. ; 25 cm.
On label mounted on t.p.: D. Davey, New York.
Bibliografía: p. 220-232.
Reseña: MathSciNet, 32 #8210