TY - JOUR AU - Boyadzhiev, Georgi TI - Bi-Characteristic Curves of Body and Surface Waves and Application in Geophysics JO - Serdica Mathematical Journal PY - 2015 SP - 513 EP - 526 VL - 41 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SMJ2_2015_41_4_a11/ LA - en ID - SMJ2_2015_41_4_a11 ER -