Cosmological Constraints on a Temporal Variation of the Proton-to-electron Mass Ratio based on the Red-shifted Lines of Extragalactic Argonium
2012 ◽
Vol 747
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pp. L7
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2007 ◽
Vol 241
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pp. 155-179
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Vol 454
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pp. 2292-2298
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pp. 433-444
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pp. 46
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2011 ◽
Vol 417
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pp. 3010-3024
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