%0 Journal Article %A L. A. Pastur %A B. A. Khoruzhenko %T Phase transitions in quantum models of rotators and ferroelectrics %J Teoretičeskaâ i matematičeskaâ fizika %D 1987 %P 111-124 %V 73 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1987_73_1_a10/ %G ru %F TMF_1987_73_1_a10