%0 Journal Article
%A Yu. S. Tyupkin
%T On the adiabatic definition of the $S$ matrix in the formalism of $L$ functionals
%J Teoretičeskaâ i matematičeskaâ fizika
%D 1973
%P 169-177
%V 16
%N 2
%U http://geodesic.mathdoc.fr/item/TMF_1973_16_2_a2/
%G ru
%F TMF_1973_16_2_a2