%0 Journal Article %A N. P. Bogolyubov %T Phase transition of the first kind with respect to the density in a~model of spontaneous breaking of chiral symmetry %J Teoretičeskaâ i matematičeskaâ fizika %D 1988 %P 465-472 %V 75 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1988_75_3_a13/ %G ru %F TMF_1988_75_3_a13