Manifolds with non-stable fundamental groups at infinity. Guilbault, Craig R. — 2000 Geometry & Topology
Products of open manifolds with ℝ Craig R. Guilbault — 2007 Fundamenta Mathematicae We present a characterization of those open n-manifolds (n ≥ 5) whose products with the real line are homeomorphic to interiors of compact (n+1)-manifolds with boundary.