TY - BOOK AU - Yu. V. Egorov,M. A. Shubin AU - Shubin,M. A. TI - PARTIAL DIFFERENTIAL EQUATIONS IV SN - 354053363X U1 - 515.353 PY - 1993/// CY - PB - Springer-Verlag,Berlin KW - Mathematical Analysis KW - Differential Equations, -- Hyperbolic N1 - Includes Bibliographical References And Indexes ER -