%0 Journal Article
%A S. A. Pirogov
%T Phase transitions of the first kind for spin models with a spin that assumes the values $-1$, $0$, $1$
%J Doklady Akademii Nauk
%D 1974
%P 1273-1275
%V 214
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1974_214_6_a9/
%G ru
%F DAN_1974_214_6_a9