@article{MT_2007_10_2_a7,
     author = {I. M. Pupyshev},
     title = {The {Extension} of {Functions} of {Sobolev} {Classes} {Beyond} the {Boundary} of {the~Domain} on {Carnot} {Groups}},
     journal = {Matemati\v{c}eskie trudy},
     pages = {187--212},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2007_10_2_a7/}
}