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Four direct measurements of the fine-structure constant 13 billion years ago.
Wilczynska MR, Webb JK, Bainbridge M, Barrow JD, Bosman SEI, Carswell RF, Dąbrowski MP, Dumont V, Lee CC, Leite AC, Leszczyńska K, Liske J, Marosek K, Martins CJAP, Milaković D, Molaro P, Pasquini L. Wilczynska MR, et al. Among authors: martins cjap. Sci Adv. 2020 Apr 24;6(17):eaay9672. doi: 10.1126/sciadv.aay9672. Print 2020 Apr. Sci Adv. 2020. PMID: 32917582 Free PMC article.
Cosmology with varying constants.
Martins CJ. Martins CJ. Philos Trans A Math Phys Eng Sci. 2002 Dec 15;360(1801):2681-95. doi: 10.1098/rsta.2002.1087. Philos Trans A Math Phys Eng Sci. 2002. PMID: 12626260