@article{SM_2004_195_11_a0,
     author = {Yu. A. Aminov and M. G. Szajewska},
     title = {Gaussian torsion of a 2-dimensional surface defined implicitly in 4-dimensional {Euclidean} space},
     journal = {Sbornik. Mathematics},
     pages = {1545--1556},
     year = {2004},
     volume = {195},
     number = {11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2004_195_11_a0/}
}