TY - JOUR AU - I. A. Kipriyanov AU - Yu. V. Zasorin TI - Fundamental solution of the wave equation with several singularities and the Huygens principle JO - Differencialʹnye uravneniâ PY - 1992 SP - 452 EP - 462 VL - 28 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1992_28_3_a12/ LA - ru ID - DE_1992_28_3_a12 ER -