by Barth, M., De Clercq, C., De Wolf, E.A., Dumont, J.J., Johnson, D.P., Lemonne, J., Peeters, P., Drevermann, H., Goldschmidt-Clermont, Y., Harigel, G., Milstene, C., Porte, J.R., Ross, R.T., Spyropoulou-Stassinaki, M., Squarcia, S., Theocharopoulos, P., Caso, C., Contri, R., Fontanelli, F., Monge, R., Trevisan, U., Baland, J.F., Beaufays, J., Hanton, J., Grard, F., Gatignon, L., Kittel, W., Metzger, W.J., Van der Poel, P.A., Schotanus, D.J., Stergiou, A., Van De Walle, R.T., Borovikov, A., Chliapnikov, P.V., Fenyuk, A.B., Gerdyukov, L., Gritsaenko, I., Kasian, O., Khromova, G., Kubic, V.M., Lugovsky, S., Nikolaenko, V.N., Petrovikh, Y., Ronjin, V.M., Yarba, V.
Published in Nuclear physics. B (01.01.1981)