Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AA_1998_10_3_a5, author = {S. K. Smirnov and V. P. Havin}, title = {Approximation and extension problems for some classes of vector fields}, journal = {Algebra i analiz}, pages = {133--162}, publisher = {mathdoc}, volume = {10}, number = {3}, year = {1998}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_1998_10_3_a5/} }
S. K. Smirnov; V. P. Havin. Approximation and extension problems for some classes of vector fields. Algebra i analiz, Tome 10 (1998) no. 3, pp. 133-162. http://geodesic.mathdoc.fr/item/AA_1998_10_3_a5/