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@article{MAT_1966_10_4_a3, author = {H. Whitney}, title = {On ideals of differentiable functions}, journal = {Matematika}, pages = {79--100}, publisher = {mathdoc}, volume = {10}, number = {4}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1966_10_4_a3/} }
H. Whitney. On ideals of differentiable functions. Matematika, Tome 10 (1966) no. 4, pp. 79-100. http://geodesic.mathdoc.fr/item/MAT_1966_10_4_a3/