@article{MZM_2013_93_2_a10,
     author = {D. V. Radchenko},
     title = {Approximation by {Maps} with {Nonnegative} {Jacobian}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {263--275},
     publisher = {mathdoc},
     volume = {93},
     number = {2},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2013_93_2_a10/}
}