Selected Publications

• Properly homotopic nontrivial planes are parallel, Topology and Its Applications 48 (1992) 235--243.
• Properly homotopic planes are isotopic, Fundamenta Mathematicae 146 (1995), 141--152.
• Infinite Cyclic normal subgroups fundamental groups of noncompact 3-manifolds, Proceedings of the American Mathematical Society, volume 120, Number 3, March 1994, 959--963.
• A weak characteristic pair for end-irreducible 3-manifolds , Transactions of the American Mathematical Society, Volume 341, Number 1, January 1994, 377--403.
• Reidemeister Move on 1-Manifolds in RXD2, Journal of Knot Theory and Its Ramifications, Vol. 11, No. 1, (2002) 109--119