@article{MT_1994_26_a0,
     author = {S. K. Godunov and V. M. Gordienko and G. A. Chumakov},
     title = {Quasi-isometric parametrization of a curvilinear quadrangle and a metric of constant curvature},
     journal = {Matemati\v{c}eskie trudy},
     pages = {3--19},
     publisher = {mathdoc},
     volume = {26},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1994_26_a0/}
}