Preprints

1. Complex Lorentzian Leech lattice and the bi-monster, J. Algebra 309 (2007), no. 1, 32--56. arXiv:math/0508228, dvi, pdf.
2. Reflection group of the quaternionic Lorentzian Leech lattice, J. Algebra 309 (2007), no. 1, 57--68. arXiv:math/0511650, dvi, pdf.
3. Comnbinatorial cell complexes and Poincare duality (preprint 2008). arXiv:0807.4165, dvi, pdf.