Geodesic
On a Problem by R.A. Hirschfeld: Counterexample
Canadian mathematical bulletin, Tome 8 (1965) no. 6, p. 835

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The following question was asked by R. A. Hirschfeld in [1]: "E and F are Banach spaces, F reflexive, D is a subset of E and T: D→F a nonlinear contraction, i.e., Can T be extended to a contraction (for E = F = Hilbert space the answer is yes)." 
Edelstein, M. On a Problem by R.A. Hirschfeld: Counterexample. Canadian mathematical bulletin, Tome 8 (1965) no. 6, p. 835. doi: 10.4153/CMB-1965-066-6
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     title = {On a {Problem} by {R.A.} {Hirschfeld:} {Counterexample}},
     journal = {Canadian mathematical bulletin},
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     year = {1965},
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     doi = {10.4153/CMB-1965-066-6},
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