@article{ZNSL_1994_209_a1,
     author = {E. Sh. Gutshabash},
     title = {Some geometrical aspects of nonlinear ${\CYRO}({\CYRZ})$ sigmamodel in $(2+0)$ dimensions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {20--27},
     publisher = {mathdoc},
     volume = {209},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1994_209_a1/}
}