1. B. Simon, Schrödinger Operators (Berlin, 1987).
2. On the spectrum of the Schrodinger operator for some many-particle systems
3. M. Reed and B. Simon., “Scattering theory,” Academic. Methods of Modern Mathematical Physics. III. (1979).
4. M. Reed and B. Simon., “Analysis of operators,” Academic. Methods of Modern Mathematical Physics. IV. (1978).
5. Description of the spectrum of the energy operator of quantum-mechanical systems that is invariant with respect to permutations of identical particles