by Abrahamian, L.O., Avakian, R.O., Aganiants, A.O., Adamian, F.V., Armaganian, A.A., Arutunian, L.G., Demiokhina, N.A., Elbakian, G.M., Kazarian, G.Kh, Khudaverdian, A.G., Khurshudian, L.S., Lebedev, A.N., Manukian, J.V., Markarian, R.Kh, Muradian, E.G., Pilipossian, S.E., Sirunian, A.M., Vartapetian, H.A.
Published in Physics letters. B (01.03.1974)

by Abrahamian, L.O., Aganiants, A.O., Adamian, F.V., Danielian, V.D., Demiokhina, N.A., Gevorkian, S.R., Israelian, M.Kh, Kazarian, G.Kh, Khudaverdian, A.G., Khurshoodian, L.S., Lebedev, A.N., Manukian, J.V., Muradian, E.G., Sirunian, A.M., Vartapetian, H.A., Vatian, A.L.
Published in Physics letters. B (01.01.1972)