Equationally close subframes and representation of quotient spaces Aleš Pultr, Anna Tozzi (1993) Cahiers de Topologie et Géométrie Différentielle Catégoriques
Examples of disks in E 3 /G which cannot be approximated by P-liftable disks Edythe Woodruff (1974) Fundamenta Mathematicae
Exotic ANR's via null decompositions of Hilbert cube manifolds S. Singh (1985) Fundamenta Mathematicae