@article{IVM_1970_7_a8,
     author = {N. M. Ostianu},
     title = {Invariant framing of a~surface that carries a~net},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {72--82},
     publisher = {mathdoc},
     number = {7},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1970_7_a8/}
}