1. Arenhövel, H.: In: Proceedings of International School of Intermediate-Energy Nuclear Physics, Verona (Bergère, R., Costa, S., Schaerf, C., eds.), p.55. Singapore: World Scientific 1986
2. Machleidt, R., Holinde, K., Elster, Ch., Phys. Rep.149, 1 (1987)
3. Schmitt, K.-M., Arenhövel, H.: Few-Body Systems6, 117 (1989)
4. Cambi, A., Mosconi, B., Ricci, P.: Phys. Rev. Lett.48, 462 (1982)
5. Blankenbecler, R., Sugar, R.: Phys. Rev.142, 1051 (1966)