TY - GEN AU - Garding,Lars TI - Singularities in linear wave propagation T2 - Lecture notes in mathematics SN - 354018001X (Berlin) U1 - 510 515.353 PY - 1987/// CY - Berlin , New York PB - Springer-Verlag KW - Differential equations, Hyperbolic KW - Wave-motion, Theory of KW - Singularities (Mathematics) N1 - Comtine bibliografie ER -