Geometry of the space of phylogenetic trees LJ Billera, SP Holmes, K Vogtmann Advances in Applied Mathematics 27 (4), 733-767, 2001 | 701 | 2001 |

Moduli of graphs and automorphisms of free groups M Culler, K Vogtmann Inventiones mathematicae 84 (1), 91-119, 1986 | 632 | 1986 |

Automorphisms of free groups and outer space K Vogtmann Geometriae Dedicata 94, 1-31, 2002 | 205 | 2002 |

On a theorem of Kontsevich J Conant, K Vogtmann Algebraic & Geometric Topology 3 (2), 1167-1224, 2003 | 154 | 2003 |

Rational homology of $\text {\rm Aut} $($ F_n $) A Hatcher, K Vogtmann Mathematical Research Letters 5 (6), 759-780, 1998 | 100 | 1998 |

Cerf theory for graphs A Hatcher, K Vogtmann Journal of the London Mathematical Society 58 (3), 633-655, 1998 | 94 | 1998 |

Rational homology of Bianchi groups K Vogtmann Mathematische Annalen 272 (3), 399-419, 1985 | 89 | 1985 |

Homology stability for outer automorphism groups of free groups A Hatcher, K Vogtmann Algebraic & Geometric Topology 4 (2), 1253-1272, 2004 | 85* | 2004 |

The complex of free factors of a free group A Hatcher, K Vogtmann Quarterly Journal of Mathematics 49 (196), 459-468, 1998 | 74 | 1998 |

The integral homology of SL2 and PSL2 of Euclidean imaginary quadratic integers J Schwermer, K Vogtmann Comment. Math. Helv 58 (4), 573-598, 1983 | 67 | 1983 |

Finiteness properties of automorphism groups of right‐angled Artin groups R Charney, K Vogtmann Bulletin of the London Mathematical Society 41 (1), 94-102, 2009 | 66 | 2009 |

Automorphisms of 2–dimensional right-angled Artin groups R Charney, J Crisp, K Vogtmann Geometry & Topology 11 (4), 2227-2264, 2007 | 66 | 2007 |

Equivariant outer space and automorphisms of free-by-finite groups S Krstić, K Vogtmann Comment. Math. Helv. 68 (2), 216-262, 1993 | 61 | 1993 |

A group theoretic criterion for property FA M Culler, K Vogtmann Proceedings of the American Mathematical Society 124 (3), 677-683, 1996 | 60 | 1996 |

Automorphism groups of free groups, surface groups and free abelian groups MR Bridson, K Vogtmann arXiv preprint math/0507612, 2005 | 50 | 2005 |

Spherical posets and homology stability for 0n, n K Vogtmann Topology 20 (2), 119-132, 1981 | 50 | 1981 |

A generating function for the Euler characteristic of Out (Fn) J Smillie, K Vogtmann Journal of Pure and Applied Algebra 44 (1-3), 329-348, 1987 | 48 | 1987 |

Local structure of some Out (Fn)-complexes K Vogtmann Proceedings of the Edinburgh Mathematical Society 33 (3), 367-379, 1990 | 47 | 1990 |

Automorphisms of automorphism groups of free groups MR Bridson, K Vogtmann Journal of Algebra 229 (2), 2000 | 46 | 2000 |

Hairy graphs and the unstable homology of Mod(*g*, *s*), Out(*F*_{n}) and Aut(*F*_{n})J Conant, M Kassabov, K Vogtmann Journal of Topology 6 (1), 119-153, 2013 | 44 | 2013 |