%0 Journal Article %A Boris Gralak %T Negative index materials: at the frontier of macroscopic electromagnetism %J Comptes Rendus. Physique %D 2020 %P 343-366 %V 21 %N 4-5 %I Académie des sciences, Paris %R 10.5802/crphys.29 %G en %F CRPHYS_2020__21_4-5_343_0