@article{SM_2005_196_10_a2,
     author = {V. A. Gorkavyy},
     title = {Bianchi congruences of two-dimensional surfaces in~$E^4$},
     journal = {Sbornik. Mathematics},
     pages = {1473--1493},
     publisher = {mathdoc},
     volume = {196},
     number = {10},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2005_196_10_a2/}
}