%0 Journal Article %A L. A. Khalfin %T A contribution to the quantum theory of unstable elementary particles %J Doklady Akademii Nauk %D 1965 %P 541-544 %V 165 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_165_3_a21/ %G ru %F DAN_1965_165_3_a21