by Aglizki, E.V., Boiko, V.A., Faenov, A.Ya, Korneev, V.V., Krutov, V.V., Mandelstam, S.L., Pikuz, S.A., Safronova, U.I., Sylwester, J.A., Urnov, A.M., Vainshtein, L.A., Zhitnik, I.A.
Published in Solar physics (01.02.1978)