The Commutant of a Class of Analytic Toeplitz Operators II James Thomson Indiana University Mathematics Journal 1976 text pdf 10.1512/iumj.1976.25.25063 10.1512/iumj.1976.25.25063 en Indiana Univ. Math. J. 25 (1976) 793 - 800 state-of-the-art mathematics http://iumj.org/access/