@Article{zbMATH02537665,
Author = {H. {Whitney}},
Title = {{Analytic extensions of differentiable functions defined in closed sets}},
FJournal = {{Transactions of the American Mathematical Society}},
Journal = {{Trans. Am. Math. Soc.}},
ISSN = {0002-9947; 1088-6850/e},
Volume = {36},
Pages = {63--89},
Year = {1934},
Publisher = {American Mathematical Society (AMS), Providence, RI},
Language = {English},
Zbl = {60.0217.01}
}