Geodesic
Some geometrical aspects of nonlinear $О(З)$ sigmamodel in $(2+0)$ dimensions
Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 12, Tome 209 (1994), pp. 20-27 Cet article a éte moissonné depuis la source Math-Net.Ru

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Some connections on the basis of gauge equivalence between elleptic version of $O(3)$ sigma-model and $sh$-Gordon equation being proved earlier were obtained. Their interpretation in terms of differential geometry is given. Bibliography: 9 titles. 
@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},
     year = {1994},
     volume = {209},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1994_209_a1/}
}
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E. Sh. Gutshabash. Some geometrical aspects of nonlinear $О(З)$ sigmamodel in $(2+0)$ dimensions. Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 12, Tome 209 (1994), pp. 20-27. http://geodesic.mathdoc.fr/item/ZNSL_1994_209_a1/