@article{ZNSL_1974_45_a2,
     author = {S. M. Vladimirova and Yu. A. Volkov},
     title = {Isometric transformations of infinite convex surfaces in {Loba\v{c}evski\u{i}} space},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {56--62},
     year = {1974},
     volume = {45},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1974_45_a2/}
}