1. Culhane, J.L., Catura, R.C., Pounds, K.A., de Korte, P.A.J., Franks, A., Garmire, G., Fabian, A. and Margon, B.: these proceedings, p. 581.
2. Davidson, P.J.N., Culhane, J.L. and Mitchell, R.J.: 1976, Ap. J. (Lett.)206, L37.
3. Peacock, A., Andresen, R.D., van Dordrecht, A., Leimann, E.-A., Manzo, G., Taylor, B.G., Berthelsdorf, R., Culhane, J.L., Ives, J. and Sanford, P.W.: 1979, IEEE Nucl. ScienceNS-26, No. 1, 486.
4. Peacock, A., Andresen, R.D., Leimann, E.-A., Long, A.E., Manzo, G. and Taylor, B.G.: 1980, Nucl. Instr. and Meth.169, 613.
5. Peacock, A., Andresen, R.D., Manzo, G., Taylor, B.G., Villa, G., Re, S., Ives, J. and Kellock, S.: these proceedings, p. 525.