@article{CMFD_2010_35_a1,
     author = {G. Alberti and S. Bianchini and G. Crippa},
     title = {Divergence-free vector fields in~$\mathbb R^2$},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {22--32},
     publisher = {mathdoc},
     volume = {35},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2010_35_a1/}
}