@article{RM_1980_35_6_a16,
     author = {D. D. Sokolov},
     title = {On the limit cone of saddle surfaces in {pseudo-Euclidean} space},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {107--108},
     publisher = {mathdoc},
     volume = {35},
     number = {6},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1980_35_6_a16/}
}