@article{RM_1980_35_6_a18,
     author = {L. V. Ten},
     title = {Rigidity of complete surfaces of negative curvature that coincide with a~hyperbolic paraboloid outside a~compact region},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {111--112},
     publisher = {mathdoc},
     volume = {35},
     number = {6},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1980_35_6_a18/}
}