An Operator Valued Yeh-Wiener Integral, and a Wiener Integral Equation R. CameronD. Storvick Indiana University Mathematics Journal 1976 text pdf 10.1512/iumj.1976.25.25020 10.1512/iumj.1976.25.25020 en Indiana Univ. Math. J. 25 (1976) 235 - 258 state-of-the-art mathematics http://iumj.org/access/