The Initial Value Problem for the Linearized Equations of Water Waves Avner FriedmanMarvin Shinbrot Indiana University Mathematics Journal 1968 text pdf 10.1512/iumj.1968.17.17006 10.1512/iumj.1968.17.17006 en Indiana Univ. Math. J. 17 (1968) 107 - 180 state-of-the-art mathematics http://iumj.org/access/