%0 Journal Article %A I. A. Kvasnikov %T The application of the variation principle to the Ising model of an antiferromagnetic %J Doklady Akademii Nauk %D 1957 %P 544-547 %V 113 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1957_113_3_a17/ %G ru %F DAN_1957_113_3_a17