Papers:

Actions of finite groups on homotopy 3spheres,
TAMS 284(1984), no. 1, 141151.

Branched covers according to J.W. Alexander,
Collectanea Math. 37(1986), 5560.

with Darryl McCullough, Finiteness conditions for 3manifolds with boundary,
Amer. J. of Math. 109(1987), 11551169.
Correction to: Finiteness conditions for 3manifolds with boundary,
Amer. J. Math. 112(1990), 4145.

Separation properties of codimension1 immersions,
Topology 27(1988), no. 3, 319321.
 with
Geoffrey Mess, Conjugacy classes of finite subgroups of Kleinian
groups,
Amer. J. Math. 113(1991), 179188.
 with Mladen Bestvina, A counterexample to generalized accessibility, in Arboreal Group Theory (R.C. Alperin, ed.), MSRI Publ., vol. 19, SpringerVerlag, 1991, 133141.
 with Mladen Bestvina, Bounding the complexity of simplicial group actions on trees,
Inventiones 103(1991), 449469.
 with Mladen Bestvina, A combination theorem for negatively curved spaces,
JDG 35(1992), 85101. Addendum and correction to: A combination theorem for negatively curved spaces, JDG 43(1996), 783788.

with Mladen Bestvina, Stable actions on real trees,
Inventiones 121(1995), 287321.

with Mladen Bestvina, Outer Limits, preprint, 1994, 19 pages.

with
Mladen Bestvina and Michael Handel, Laminations, trees, and irreducible automorphisms of free group,
GAFA 7(1997), 215244.
Erratum to: "Laminations, trees, and irreducible automorphisms of free groups", GAFA 7(1997), 11431143.
This material is based upon work supported by the National Science Foundation.
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