1. Migdal A. B.: Theory of finite Fermi systems and the properties of atomic nuclei (in Russian), Nauka, Moscow, 1965.
2. Baz A. I., Zeldovich Ya. B., Perelomov A. M.: Scattering, reactions and decays in nonrelativistic quantum mechanics (in Russian), Nauka, Moscow, 1966.
3. Zhivopistsev F. A.: Yad. Fiz.1 (1965) 600.
4. Emrich K.: Nucl. Phys. A160 (1971) 1.
5. Zhivopistsev F. A., Rzhevsky E. S.: Izv. Akad. Nauk USSR, Ser. Fiz.41 (1977) 2160.