American Physical Society, Physical Review Letters, 18(100)
DOI: 10.1103/physrevlett.100.189701
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A Comment on the Letter by B. Arnaud et al., [Phys. Rev. Lett.PRLTAO0031-9007 96, 026402 (2006)10.1103/PhysRevLett.96.026402]. The authors of the Letter offer a Reply.