1. Barisic and D.Bjelis in “Theoretical aspects of band structures and electronic properties of one-dimensional solids”. H.Kamimura ed., D.Reidel Publ. 1985, 49.
2. D.Jérome and H.Schulz, Adv. in Phys., 31 (1982) 299.
3. K.Lerstrup et al., this volume.
4. T.E.Phillips, T.J.Kistenmacher, A.N.Bloch and D.O.Cowan, JCS, Chem.Comm., (1976) 334.
5. T.J.Kistenmacher, T.J. Phillips and D.O.Cowan, Acta Cryst. B30 (1978) 763.