Fioralba Cakoni, David Colton, Houssem Haddar. The computation of lower bounds for the norm of the index of refraction in an anisotropic media from far field data.
Journal of Integral Equations and Applications, Rocky Mountain Mathematics Consortium, 2009, 21, pp.203--227.
〈10.1216/JIE-2009-21-2-203〉.
〈hal-00743819〉