A Generalization of the Alexander Duality Theorem, II W. Massey Indiana University Mathematics Journal 1983 text pdf 10.1512/iumj.1983.32.32024 10.1512/iumj.1983.32.32024 en Indiana Univ. Math. J. 32 (1983) 311 - 317 state-of-the-art mathematics http://iumj.org/access/