@article{JMAG_2001_8_1_a0,
     author = {Yu. A. Aminov and V. A. Gorkavyy},
     title = {On the {Gauss} curvature of closed surfaces in $E^3$ and~$E^4$},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {3--16},
     year = {2001},
     volume = {8},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2001_8_1_a0/}
}