1. Barnsley, M. and Cornille, H.: 1981,Proc. Roy. Soc. Lond. A374, 371.
2. Brown, R.E. and Jarmie, N.: 1990,Phys. Rev. C41, 1391.
3. Critchfield, C.L.: 1972, in: F. Reines (ed.),Cosmology, Fusion, and Other Matters. George Gamow Memorial Volume, University of Colorado Press, Colorado, pp. 186?191.
4. Fowler, W.A.: 1984,Rev. Mod. Phys. 56, 149.
5. Haubold, H.J. and John, R.W.: 1978,Astron. Nachr. 299, 225.