@article{INTG_1974_5_a14,
     author = {V. I. Romanov},
     title = {On the geometry of point mappings of four-dimensional {Euclidean} spaces},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {345--358},
     publisher = {mathdoc},
     volume = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1974_5_a14/}
}