Isotropic and anisotropic description of superconducting state in CaC6 compound R. Szczȩśniak, E. A. Drzazga and D. Szczȩśniak Eur. Phys. J. B, 88 2 (2015) 52 Published online: 18 February 2015 DOI: 10.1140/epjb/e2015-50616-6