1. Solvable Models in Quantum Mechanics;Albeverio,1988
2. Singular Perturbations of Differential Operators;Albeverio,1999
3. Schur Functions, Operator Colligations, and Reproducing Kernel Pontryagin Spaces;Alpay,1997
4. Foundations of the Theory of Linear Operators in Spaces with an Indefinite Metric;Azizov,1986
5. On the Lee model;Berezin;Mat. Sb.,1963