@article{TMF_2000_122_2_a13,
     author = {A. E. Winn},
     title = {The hyperbolic {Heisenberg} and sigma models in $1+1$ dimensions},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {310--320},
     publisher = {mathdoc},
     volume = {122},
     number = {2},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2000_122_2_a13/}
}