1. Amado, R. D.: Ann. Rev. Nucl. Sci. 19, 61 (1969).
2. Delves, L. M. and Phillips, A. C.: Rev. Mod. Phys. 41, 497 (1969).
3. Mitra, A. N.: Adv. Nucl. Phys. 3, 1 (1969).
4. McKee, J. S. C. and Rolph, P. M. (eds.): Three Body Problem in Nuclear and Particle Physics, Amer. Elsevier Pubi. Comp., New York 1969.
5. Watson, K. M. and Nuttal, J.: Topics in Several Particle Physics, Holden Day, San Francisco 1967.