Truncations of BMO Functions C. Sundberg Indiana University Mathematics Journal 1984 text pdf 10.1512/iumj.1984.33.33039 10.1512/iumj.1984.33.33039 en Indiana Univ. Math. J. 33 (1984) 749 - 771 state-of-the-art mathematics http://iumj.org/access/