@article{DAN_1990_310_1_a0,
     author = {\`E. D. Baladze},
     title = {Solution of the {Sz\"okefalvi-Nagy} problem for zonoids},
     journal = {Doklady Akademii Nauk},
     pages = {11--14},
     publisher = {mathdoc},
     volume = {310},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_310_1_a0/}
}