@article {2015A\&A...580A..22P,
	title = {Planck intermediate results. XXIV. Constraints on variations in fundamental constants},
	journal = {\aap},
	volume = {580},
	year = {2015},
	month = {aug},
	pages = {A22},
	keywords = {atomic data, cosmic background radiation, cosmological parameters, cosmology: observations},
	doi = {10.1051/0004-6361/201424496},
	author = {\sorthelpPlanck Collaboration 201424Planck Collaboration and et al.}
}