Here are some of my research papers:

E-infinity obstruction theory  

Homology, Homotopy Applications 20 (1) (2018) 155-184.       Preprint version: (dvi) (pdf)    

Partition complexes, duality and integral tree representations (dvi)

Alg. and Geom. Topology 4 (2004) 943 - 960.   © Geometry and Topology Publications 2004.

Classical obstructions and $S$-algebras (dvi, updated)

Structured ring spectra, eds. A. Baker and B. Richter, LMS Lecture Note Series 315 (2004) 133 - 149.
© Cambridge Univ. Press 2004.

Gamma homology, Lie representations and $E_\infty$ multiplications (dvi)

Invent. Math. 152 (2003), 331 - 348.   The original article is available at http://link.springer.de   © Springer 2003.

Gamma homology of group algebras and of polynomial algebras (with Birgit Richter) (dvi)

Proceedings of the 2002 Northwestern University Conference on Algebraic Topology,
Contemporary Mathematics 346 (2004) 453 - 461.   © AMS 2004.

Operads and gamma homology of commutative rings (with Sarah Whitehouse) (dvi)

Math. Proc. Cambridge Philos. Soc. 132 (2002), 197 - 234.   © Cambridge Philosophical Society 2002.

Here are links to my:

(Last modified 29 January 2018.)