@article{KUTGS_1974_7_a9,
     author = {N. L. Nasrullaev},
     title = {Infinitesimal bendings of surfaces in the {pseudo-Euclidean} space~${}^1E_3$},
     journal = {Trudy Geometricheskogo Seminara},
     pages = {78--84},
     year = {1974},
     volume = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUTGS_1974_7_a9/}
}