1. Welton, T.A.: In: Marion J.B., Fowler, J.D. (eds.) Fast Neutron Physics II, p. 1317. Interscience, New York (1963)
2. Bystricki, J., Lehar, F., Winternitz, P.: J. de Physique 39, 1 (1978)
3. Huber, P., Meyer, K.P. (eds.): Proceedings of the International Symposium on Polarization Phenomena of Nucleons, Basel 1960. Helv. Phys. Acta Suppl. VI, Birkhäuser, Basel (1961)
4. Barschall, H.H., Haeberli, W. (eds.): Proceedings of the 3rd International Symposium on Polarization Phenomena in Nuclear Reactions, Madison 1970, p. xxv. University of Wisconsin Press, Madison (1971)
5. Darden, S.E.: In: [6] p. 39 (1971)