In Memoriam Seymour Sherman 1917-1977 Indiana University Mathematics Journal 1978 text pdf 10.1512/iumj.1978.27.27073 10.1512/iumj.1978.27.27073 en Indiana Univ. Math. J. 27 (1978) 0 - 0 state-of-the-art mathematics http://iumj.org/access/