Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1993_54_1_a2, author = {Yu. V. Kryakin}, title = {On exact constants in the {Whitney} theorem}, journal = {Matemati\v{c}eskie zametki}, pages = {34--51}, publisher = {mathdoc}, volume = {54}, number = {1}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1993_54_1_a2/} }
Yu. V. Kryakin. On exact constants in the Whitney theorem. Matematičeskie zametki, Tome 54 (1993) no. 1, pp. 34-51. http://geodesic.mathdoc.fr/item/MZM_1993_54_1_a2/