@article{DAN_1958_121_2_a8,
     author = {Sun Khe-shen},
     title = {On the rigidity of an unclosed surface of non-negative curvature in the case of a non-orthogonal bushing linkage},
     journal = {Doklady Akademii Nauk},
     pages = {229--232},
     publisher = {mathdoc},
     volume = {121},
     number = {2},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_121_2_a8/}
}