@article{ZNSL_1979_83_a5,
     author = {M. A. Shtan'ko},
     title = {Nonexistence of locally flat approximations in codimension two},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {93--100},
     publisher = {mathdoc},
     volume = {83},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1979_83_a5/}
}