that do not lift to embeddings in 4-space”, Knot theory (Warsaw, 1995), Banach Center Publ., 42, Polish Acad. Sci., Warsaw, pp. 29–47, MR1634445, CiteSeerx: 10
generalized Poincaré conjecture in dimension n≥5: Every closed, n-dimensional manifold homotopy-equivalent to the n-dimensional sphere is homeomorphic to it.