@article{TMF_1984_60_1_a13, author = {A. V. Chubukov}, title = {Orientational phase transitions in quantum spin systems with two-component order parameter}, journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika}, pages = {145--153}, publisher = {mathdoc}, volume = {60}, number = {1}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TMF_1984_60_1_a13/} }