On removable singularities for integrable CR functions Joel MerkerEgmont Porten 32D2032A2032D1032C1632F40integrable CR functionsCR orbitsanalytic discsremovable singularities Indiana University Mathematics Journal 1999 text pdf 10.1512/iumj.1999.48.1632 10.1512/iumj.1999.48.1632 en Indiana Univ. Math. J. 48 (1999) 805 - 856 state-of-the-art mathematics http://iumj.org/access/