1. Faddeev L. D.: Trudy Matem. Instituta Akad. Nauk SSSR69 (1963), Engl. transl.: “Mathematical Aspects of the Three-Body Problem in Quantum Mechanics”, Israel Program for Sci. Transl., Jerusalem, 1965.
2. Prugovečki E., Zorbas J.: Math. Phys.14 (1973) 1398.
3. Veselova A. M.: Teor. Mat. Fiz.35 (1978) 180.
4. Alt E. O., Grassberger P., Sandhas W.: Phys. Rev. C17 (1978) 1981.
5. Van Haeringen H.: On the Exact Solution of the Scattering and Break-up Equations for Three-Particle Systems with Coulomb Interaction, preprint, Natuurkundig Laboratorium der Vrije Universiteit, Amsterdam, 1978.