Affiliation: | High Energy Physics Institute of the Kazakh Academy of Sciences, Alma-Ata, USSR; Institute of Nuclear Physics, Cracow, Poland; Joint Institue for Nuclear Research, Dubna, USSR; Physical-Technical Institute of the Soviet Academy of Sciences, Leningrad, USSR; Physical Institute of the Soviet Academy of Sciences, Moscow, USSR; Moscow State University, Moscow, USSR; Physical-Technical Institute of the Academy of Sciences of Uzbek SSR, Tashkent, USSR; Institute of Mathematics and Physics of the Mongolian Academy of Sciences, Ulan-Bator, Mongolia |