%0 Journal Article %A B. S. Nakhapetian %T Strong convexity of pressure for spin lattice systems %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1997 %P 341-347 %V 52 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1997_52_2_a9/ %G en %F RM_1997_52_2_a9