%0 Journal Article %A A. V. Chubukov %T Orientational phase transitions in quantum spin systems with two-component order parameter %J Teoretičeskaâ i matematičeskaâ fizika %D 1984 %P 145-153 %V 60 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1984_60_1_a13/ %G ru %F TMF_1984_60_1_a13