1. Fick, D.: Annu. Rev. Nucl. Part. Sci.31, 53 (1981)
2. Oertzen, W. von: Nukleonika25, 939 (1980); Lectures at XIIth Summer School on Nuclear Physics, Mikolajki, 1979
3. Steffens, E.: In: Proceed. Conf. Polarisation Phenomena in Nuclear Physics, 1980, Santa Fe, p. 1001, and further contributions
4. See Polarisation Phenomena in Nuclear Physics, Conf. Proceed. 1980, Santa Fe, eg. p. 282
5. Alder, K., Winther, A.: Electromagnetic excitation. Amsterdam: North Holland 1975