%0 Journal Article %A M. A. Osipov %A A. S. Shumovskii %T Violation of the principle of minimality of the free energy in the self-consistent field approximation for some models of ferroelectrics %J Teoretičeskaâ i matematičeskaâ fizika %D 1981 %P 125-131 %V 46 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1981_46_1_a11/ %G ru %F TMF_1981_46_1_a11