%0 Journal Article %A I. A. Kashapov %T Structure of ground states in three-dimensional using model with three-step interaction %J Teoretičeskaâ i matematičeskaâ fizika %D 1977 %P 110-118 %V 33 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1977_33_1_a8/ %G ru %F TMF_1977_33_1_a8