Interpolation by the Real Method between BMO, L^{\alpha}(0 < \alpha < \infty) and H^{\alpha}(0 < \alpha < \infty) R. Hanks Indiana University Mathematics Journal 1977 text pdf 10.1512/iumj.1977.26.26054 10.1512/iumj.1977.26.26054 en Indiana Univ. Math. J. 26 (1977) 679 - 689 state-of-the-art mathematics http://iumj.org/access/