@article{JEMS_2013_15_3_a7,
     author = {Jean Van Schaftingen},
     title = {Limiting {Sobolev} inequalities for vector fields and canceling linear differential operators},
     journal = {Journal of the European Mathematical Society},
     pages = {877--921},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2013},
     doi = {10.4171/jems/380},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/380/}
}