1. Γ+-structures I & II;Barratt;Topology,1974
2. C.-F. Bödigheimer, On the topology of the moduli spaces of Riemann surfaces. Part II: homology operations, preprint, Math. Gottingensis Heft 23 (1990).
3. F.R. Cohen, U. Tillmann, Towards homology operations for mapping class groups, in: Homotopy Theory via Algebraic Geometry and Group Representations, AMS Contemporary Mathematics, Vol. 220, 1998, pp. 323–334.
4. Equivalences between homotopy theories of diagrams, Algebraic topology and algebraic K-theory;Dwyer;Ann. Math. Stud.,1987
5. The stable mapping class group and Q(CP+∞);Madsen;Invent. Math.,2001