TY - BOOK AU - Otway, Thomas H. TI - The Dirichlet problem for elliptic-hyperbolic equations of Keldysh type SN - 9783642244148 U1 - 510.4 PY - 2012/// CY - New York PB - Springer KW - Lecture notes -- Mathematics UR - http://link.springer.com/bookseries/304 ER -