русский/английский/Some remarks on ψ-particles / S.M. Bilen'kij, B. Pontercorvo.Some remarks on ψ-particles / S.M. Bilen'kij, B. Pontercorvo.Some remarks on ψ-particles.Б. м./, 1975 ( ). - 1975.Some remarks on ψ-particles. Б. м., 1975 . Bilen'kij, S.M. .S.M.Pontercorvo /