TY - GEN AU - GĂ„rding,Lars TI - Singularities in linear wave propagation T2 - Lecture notes in mathematics SN - 354018001X (Berlin) U1 - 510 s515.3/53 PY - 1987/// CY - Berlin, New York PB - Springer-Verlag KW - Differential equations, Hyperbolic KW - Wave motion, Theory of KW - Singularities (Mathematics) N1 - "Subseries: Nankai Institute of Mathematics, Tianjin, P.R. China, vol. 2."; Contine index ER -