@article{ZNSL_2014_425_a6,
     author = {S. Repin},
     title = {Estimates of the distance to the set of divergence free fields},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {99--116},
     publisher = {mathdoc},
     volume = {425},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2014_425_a6/}
}