Published in: Pure and applied mathematics ; 9500

Published in: Academic Press International Edition

Published in: Universitext

Published in: Notas de matemática ; 60 - North Holland mathematics studies ; 24

Published in: Universitext - SpringerLink ; Bücher - Springer eBook Collection ; Mathematics and Statistics

Published in: Bulletin de la Classe des sciences ; Vol. 73, n° 1, pp. 191-200

Published in: North Holland mathematics studies ; 24 - Notas de matemática ; 60

Published in: The American Mathematical Monthly, 93 (1986) 3, Seite 230-231

Published in: The American Mathematical Monthly, 93 (1986) 3, Seite 230-231

Published in: Archiv der Mathematik, 19 (1968) 4, Seite 428-435

Published in: Topology and its Applications, 153 (2005) 5-6, Seite 724-734

Published in: Topology and its Applications, 137 (2004) 1-3, Seite 39-50

Published in: Topology and its Applications, 98 (1999) 1-3, Seite 47-60

Published in: Topology and its Applications, 77 (1997) 2, Seite 193-211

Published in: Georgian Mathematical Journal, 3 (1996) 6, Seite 565-570

Published in: gmj, 3 (1996) 6, Seite 565-570

Published in: Annals of the New York Academy of Sciences, 607 (1990) 1, Seite 107-115

Published in: Proceedings of the American Mathematical Society, 100 (1987) 2, Seite 242-246

Published in: Proceedings of the American Mathematical Society, 100 (1987) 2, Seite 242

Published in: Proceedings of the American Mathematical Society, 100 (1987) 2, Seite 242-246