@article{DAN_1962_144_6_a7,
     author = {A. V. Chakmazyan},
     title = {Evolute surfaces of the dual-normalized 2-space $D_2$ in $E_4$},
     journal = {Doklady Akademii Nauk},
     pages = {1233--1236},
     publisher = {mathdoc},
     volume = {144},
     number = {6},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_144_6_a7/}
}