%0 Journal Article %A S. N. Isakov %T Phase diagrams and singularity at the point of a~phase transition of the first kind in lattice gas models %J Teoretičeskaâ i matematičeskaâ fizika %D 1987 %P 426-440 %V 71 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1987_71_3_a12/ %G ru %F TMF_1987_71_3_a12