Some Weighted Norm Inequalities for the Area Integral S. ChanilloRichard Wheeden Indiana University Mathematics Journal 1987 text pdf 10.1512/iumj.1987.36.36016 10.1512/iumj.1987.36.36016 en Indiana Univ. Math. J. 36 (1987) 277 - 294 state-of-the-art mathematics http://iumj.org/access/