“…Earlier results include [SIC92,SU92,CP92], and a simplified proof was presented in [OS96]. Stability results for this inverse problem are in [Ca10,Ca11], boundary determination results are in [Mc97,JM00], the case of chiral media is considered in [Mc00], and a recent uniqueness result for C 1 coefficients is given in [CZ13]. The inverse problem for Maxwell equations on manifolds was discussed in [OPS03].…”