Some papers:

Actions of finite groups on homotopy 3-spheres, TAMS 284(1984), no. 1, 141--151.

Branched covers according to J.W. Alexander, Collectanea Math. 37(1986), 55--60.

with Darryl McCullough, Finiteness conditions for 3-manifolds with boundary, Amer. J. of Math. 109(1987), 1155--1169. Correction to: Finiteness conditions for 3-manifolds with boundary, Amer. J. Math. 112(1990), 41--45.

Separation properties of codimension-1 immersions, Topology 27(1988), no. 3, 319--321.

with Geoffrey Mess, Conjugacy classes of finite subgroups of Kleinian groups, Amer. J. Math. 113(1991), 179--188.

with Mladen Bestvina, A counterexample to generalized accessibility, in Arboreal Group Theory (R.C. Alperin, ed.), MSRI Publ., vol. 19, Springer-Verlag, 1991, 133--141.

with Mladen Bestvina, Bounding the complexity of simplicial group actions on trees, Inventiones 103(1991), 449--469.

with Mladen Bestvina, A combination theorem for negatively curved spaces, JDG 35(1992), 85--101. Addendum and correction to: A combination theorem for negatively curved spaces, JDG 43(1996), 783--788.

with Mladen Bestvina, Stable actions on real trees, Inventiones 121(1995), 287--321.

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), 215--244. Erratum to: "Laminations, trees, and irreducible automorphisms of free groups", GAFA 7(1997), 1143--1143.

with Michael Handel, Mapping tori of free group automorphisms are coherent, , Ann. of Math. 149(1999), 1061--1077.

with Mladen Bestvina and Michael Handel, The Tits alternative for Out(F_n) I: Dynamics of exponentially growing automorphisms, Ann. of Math. 151(2000), 517--623.

with Mladen Bestvina and Michael Handel, Solvable subgroups of Out(F_n) are virtually abelian, Geometriae Dedicata 104 (2004), no. 1, 71--96.

with Mladen Bestvina, The topology at infinity of Out(F_n), Invent. Math. 140(2000), no. 3, 651--692.

with Mladen Bestvina, Proper actions of lattices on contractible manifolds, Invent. Math. 150(2002), no. 2, 237--256.

with Mladen Bestvina and Michael Handel, The Tits alternative for Out(F_n) II: A Kolchin type theorem, Ann. of Math. 161(2005), no. 1, 1--59.

with Mladen Bestvina, Counting maps from a surface to a graph, GAFA 15(2005), no. 5, 939--961.

with Guo-An Diao, The Grushko decomposition of a finite graph of finite rank free groups: an algorithm.

with Mladen Bestvina, Notes on Sela's work: Limit groups and Makanin-Razborov diagrams.

with Michael Handel, The recognition theorem for Out(F_n).

with Michael Handel, Abelian subgroups of Out(F_n).

with Mladen Bestvina, A hyperbolic Out(F_n)-complex.

Lecture at MSRI: Topology at infinity of Out(F_n) (May 2000)

Course on limit groups: MSRI (Fall 2007) and Anogia, Crete (June 2008)

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