Template:Kaiser1988
From Manifold Atlas
U. Kaiser, Immersions in codimension 1 up to regular homotopy, Arch. Math. (Basel) 51 (1988), no. 4, 371–377. MR964963 (89m:57018)
U. Kaiser, Immersions in codimension 1 up to regular homotopy, Arch. Math. (Basel) 51 (1988), no. 4, 371–377. MR964963 (89m:57018)