1 - Analyse linéaire dans les espaces de dimensions finies. Manuel en problèmes |
2 - Direct methods of qualitative spectral analysis of singular differential operators |
3 - Theorie der Linearen Operatoren in Hilbert-Raum |
4 - Theory of linear operators in Hilbert space. Volume 1. Chapters I to V |
5 - Theory of linear operators in Hilbert space. Volume 2. Chapters VI to Appendix II |