@article{JMAG_1995_2_a15,
     author = {N. G. Perlova},
     title = {On the relation between the rigidity of order $k>3$ and analytic nonformability of surfaces},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {456--462},
     publisher = {mathdoc},
     volume = {2},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JMAG_1995_2_a15/}
}