#### Volume 12, issue 4 (2008)

 1 H Abbaspour, R L Cohen, K Gruher, String topology of Poincaré duality groups, from: "Proceedings of the conference on groups, homotopy and configuration spaces" (editor N Iwase et al), Geom. Topol. Monogr. 13, Geom. Topol. Publ. (2008) 1 2 J F Adams, Infinite loop spaces, Annals of Math. Studies 90, Princeton Univ. Press (1978) MR505692 3 A Adem, J Leida, Y Ruan, Orbifolds and stringy topology, Cambridge Tracts in Math. 171, Cambridge Univ. Press (2007) MR2359514 4 A Adem, Y Ruan, Twisted orbifold $K$–theory, Comm. Math. Phys. 237 (2003) 533 MR1993337 5 I A Batalin, G A Vilkovisky, Existence theorem for gauge algebra, J. Math. Phys. 26 (1985) 172 MR776145 6 M R Bridson, A Haefliger, Metric spaces of non-positive curvature, Grund. der Math. Wissenschaften 319, Springer (1999) MR1744486 7 M Chas, D Sullivan, String topology arXiv:math.GT/9911159 8 R L Cohen, V Godin, A polarized view of string topology, from: "Topology, geometry and quantum field theory", London Math. Soc. Lecture Note Ser. 308, Cambridge Univ. Press (2004) 127 MR2079373 9 R L Cohen, J D S Jones, A homotopy theoretic realization of string topology, Math. Ann. 324 (2002) 773 MR1942249 10 R L Cohen, J D S Jones, J Yan, The loop homology algebra of spheres and projective spaces, from: "Categorical decomposition techniques in algebraic topology (Isle of Skye, 2001)", Progr. Math. 215, Birkhäuser (2004) 77 MR2039760 11 R L Cohen, A A Voronov, Notes on string topology, from: "String topology and cyclic homology", Adv. Courses Math. CRM Barcelona, Birkhäuser (2006) 1 MR2240287 12 R Dijkgraaf, E Witten, Topological gauge theories and group cohomology, Comm. Math. Phys. 129 (1990) 393 MR1048699 13 A Dold, Partitions of unity in the theory of fibrations, Ann. of Math. $(2)$ 78 (1963) 223 MR0155330 14 E Getzler, Batalin–Vilkovisky algebras and two-dimensional topological field theories, Comm. Math. Phys. 159 (1994) 265 MR1256989 15 J D S Jones, Cyclic homology and equivariant homology, Invent. Math. 87 (1987) 403 MR870737 16 E Lupercio, B Uribe, Loop groupoids, gerbes, and twisted sectors on orbifolds, from: "Orbifolds in mathematics and physics (Madison, WI, 2001)", Contemp. Math. 310, Amer. Math. Soc. (2002) 163 MR1950946 17 E Lupercio, B Uribe, Inertia orbifolds, configuration spaces and the ghost loop space, Q. J. Math. 55 (2004) 185 MR2068317 18 E Lupercio, B Uribe, Holonomy for gerbes over orbifolds, J. Geom. Phys. 56 (2006) 1534 MR2240409 19 I Moerdijk, Orbifolds as groupoids: an introduction, from: "Orbifolds in mathematics and physics (Madison, WI, 2001)", Contemp. Math. 310, Amer. Math. Soc. (2002) 205 MR1950948 20 G Segal, Classifying spaces and spectral sequences, Inst. Hautes Études Sci. Publ. Math. (1968) 105 MR0232393 21 A A Voronov, Notes on universal algebra, from: "Graphs and patterns in mathematics and theoretical physics", Proc. Sympos. Pure Math. 73, Amer. Math. Soc. (2005) 81 MR2131012