@article{JMAG_1998_5_3_a0,
     author = {Yu. A. Aminov and N. V. Manzhos},
     title = {Closed surfaces in $E^4$ with nonvanishing {Whitney's} invariant},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {139--148},
     year = {1998},
     volume = {5},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JMAG_1998_5_3_a0/}
}