TY - JOUR AU - Jean-Pierre Bérenger TI - An implicit FDTD scheme for the propagation of VLF–LF radio waves in the Earth–ionosphere waveguide JO - Comptes Rendus. Physique PY - 2014 SP - 393 EP - 402 VL - 15 IS - 5 PB - Elsevier DO - 10.1016/j.crhy.2014.05.002 LA - en ID - CRPHYS_2014__15_5_393_0 ER -