by (USSR)Julij A.Dubinskij;by (United States)Jack R.McDonald; by (USSR)B.J.Zwolinski;by (United States)R.R.Shannon; by (USSR)L.Dobrzynski;by (United States)D.F.Brewer; by (USSR)N.Piskunov;by (United States)J.M.Shapiro; by (USSR)E.D.Haibemenakis;by (United States)J.S.Waugh; by (USSR)I.Duncan; (United States)C.Payne; by (USSR)I.S.Dmitriev;by (United States)J.A.Kerr; by (United States)David G.Myers;by (United States)ML.C.McDonald; by (USSR)L.Rastrigin;by (United States)J.M.Saslow...et al; by (USSR)L.V.Ovsiannikov;by (United States)J-P.Serre;