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An upper limit to the variation in the fundamental constants at redshift z = 5.2

S. A. Levshakov, F. Combes, F. Boone, I. I. Agafonova, D. Reimers and M. G. Kozlov

A&A, 540 (2012) L9

Published online: 02 April 2012

DOI: 10.1051/0004-6361/201219042

S. A. Levshakov

F. Combes

F. Boone

I. I. Agafonova

D. Reimers

M. G. Kozlov

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