%0 Journal Article %A A. V. Astakhov %T Thirring's four-fermion model and the perturbation theory %J Doklady Akademii Nauk %D 1967 %P 771-774 %V 174 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_174_4_a9/ %G ru %F DAN_1967_174_4_a9