Tangential homotopy equivalences. I. Madsen, L.R. Taylor, B. Williams (1980) Commentarii mathematici Helvetici
The Topological-Euclidean Space Form Problem. F.T. Farell, W.C. Hsiang (1978) Inventiones mathematicae
Topological properties of high-dimensional handles A. Cavicchioli, F. Hegenbarth, F. Spaggiari (1998) Cahiers de Topologie et Géométrie Différentielle Catégoriques
Trivializing Sperical Fibrations and Embeddings of Poincaré Complexes. Jonathan P.E. Hodgson (1978) Mathematische Zeitschrift