%0 Journal Article %A N. M. Petrov %T Off-shell description of two-particle interactions by the boundary condition method %J Teoretičeskaâ i matematičeskaâ fizika %D 1988 %P 53-60 %V 75 %N 1 %U http://geodesic.mathdoc.fr/item/TMF_1988_75_1_a4/ %G ru %F TMF_1988_75_1_a4