Corrigendum on 'Elliptic-Parabolic Equations of the Second Order' R. PhillipsLeonard Sarason Indiana University Mathematics Journal 1969 text pdf 10.1512/iumj.1969.18.18019 10.1512/iumj.1969.18.18019 en Indiana Univ. Math. J. 18 (1969) 191 - 191 state-of-the-art mathematics http://iumj.org/access/