#### Volume 4, issue 2 (2004)

 1 K S Brown, Cohomology of groups, Graduate Texts in Mathematics 87, Springer (1982) MR672956 2 J Conant, K Vogtmann, Morita classes in the homology of automorphism groups of free groups, Geom. Topol. 8 (2004) 1471 MR2119302 3 F Gerlits, Invariants in chain complexes of graphs, PhD thesis, Cornell University (2002) 4 A Hatcher, Homological stability for automorphism groups of free groups, Comment. Math. Helv. 70 (1995) 39 MR1314940 5 A Hatcher, Algebraic topology, Cambridge University Press (2002) MR1867354 6 A Hatcher, K Vogtmann, Cerf theory for graphs, J. London Math. Soc. $(2)$ 58 (1998) 633 MR1678155 7 A Hatcher, K Vogtmann, Rational homology of $\mathrm{Aut}(F_n)$, Math. Res. Lett. 5 (1998) 759 MR1671188 8 A Hatcher, N Wahl, Stabilization for the automorphisms of free groups with boundaries, Geom. Topol. 9 (2005) 1295 MR2174267 9 C A Jensen, N Wahl, Automorphisms of free groups with boundaries, Algebr. Geom. Topol. 4 (2004) 543 MR2077676 10 F Laudenbach, Sur les 2–sphères d'une variété de dimension 3, Ann. of Math. $(2)$ 97 (1973) 57 MR0314054 11 D Quillen, Homotopy properties of the poset of nontrivial $p$–subgroups of a group, Adv. in Math. 28 (1978) 101 MR493916 12 E H Spanier, Algebraic topology, McGraw-Hill Book Co. (1966) MR0210112 13 N Wahl, From mapping class groups to automorphism groups of free groups, J. London Math. Soc. $(2)$ 72 (2005) 510 MR2156667