@article{DAN_1968_179_1_a4,
     author = {I. S. Ovchinnikov},
     title = {The nonexistence of mappings of class $BL^{n/2}$ of a ball onto a region},
     journal = {Doklady Akademii Nauk},
     pages = {24--27},
     publisher = {mathdoc},
     volume = {179},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_179_1_a4/}
}