Geodesic
Linear and nonlinear extensions of Lipschitz functions from subsets of metric spaces
Algebra i analiz, Tome 19 (2007) no. 3, pp. 106-118.

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A relationship is established between the linear and nonlinear extension constants for Lipschitz functions defined on subsets of metric spaces. Proofs of several results announced in our earlier paper are presented.
Keywords: Lipschitz function, linear extension operator, Banach space. 
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A. Brudnyi; Y. Brudnyi. Linear and nonlinear extensions of Lipschitz functions from subsets of metric spaces. Algebra i analiz, Tome 19 (2007) no. 3, pp. 106-118. http://geodesic.mathdoc.fr/item/AA_2007_19_3_a2/

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