1. Drinkwater, M.J., Webb, J.K., Barrow, J.D., Flambaum, V.V.: Mon. Not. R. Astron. Soc. 295, 457 (1998)
2. Webb, J.K., et al.: Further evidence for cosmological evolution of the fine structure constant. Phys. Rev. Lett. 87, 091301 (2001)
3. Webb, J.K., et al.: Evidence for spatial variation of the fine structure constant. Phys. Rev. Lett. 107, 191101 (2011). ArXiv:1008.3907
4. King, J.A., et al.: Spatial variation in the fine-structure constant—new results from VLT/UVES. Mon. Not. R. Astron. Soc. 422, 3370–3414 (2012). ArXiv:1202.4758
5. Berengut, J.C., Flambaum, V.V.: Astronomical and laboratory searches for space-time variation of fundamental constants. J. Phys. Conf. Ser. 264, 012010 (2011). Arxiv:1009.3693