E. Uzal and J. H. Rose, The Impedance of Eddy Current Probes above Layered Metals Whose Conductivity and Permeability Vary Continuously, IEEE Transactions on Magnetics, vol.29, issue.2, 1993.

W. C. Chew, Waves and fields in inhomogeneous media, 1995.

J. R. Bowler and S. J. Norton, Eddy Current Inversion for Layered Conductors, Research in Nondestructive Evaluation, vol.4, issue.4, pp.205-219, 1992.
DOI : 10.1063/1.1656680