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(2011) Warren E. Lybarger et al.   PHYSICAL REVIEW A

Is there further evidence for spatial variation of fundamental constants?

(2011) J. C. Berengut et al.   PHYSICAL REVIEW D

Indications of a Spatial Variation of the Fine Structure Constant

(2011) J. K. Webb et al.   PHYSICAL REVIEW LETTERS

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(2010) Jonathan B. Whitmore et al.   ASTROPHYSICAL JOURNAL

WAVELENGTH ACCURACY OF THE KECK HIRES SPECTROGRAPH AND MEASURING CHANGES IN THE FINE STRUCTURE CONSTANT

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Isotope shift calculations in Ti II

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