A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure linesS. A. Levshakov, D. Reimers, M. G. Kozlov, S. G. Porsev and P. MolaroA&A, 479 3 (2008) 719-723DOI: https://doi.org/10.1051/0004-6361:20079116
