On Multipliers of H^p Spaces W. Sledd Indiana University Mathematics Journal 1978 text pdf 10.1512/iumj.1978.27.27052 10.1512/iumj.1978.27.27052 en Indiana Univ. Math. J. 27 (1978) 797 - 803 state-of-the-art mathematics http://iumj.org/access/