@article{DAN_1990_314_6_a1,
     author = {A. V. Arutyunov},
     title = {On the theory of quadratic mappings in {Banach} spaces},
     journal = {Doklady Akademii Nauk},
     pages = {1290--1292},
     publisher = {mathdoc},
     volume = {314},
     number = {6},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_314_6_a1/}
}