J.H. Conway and D.H. Huson. The orbifold notation for two-dimensional groups. J.H. Conway, O. Delgado Friedrichs, D.H. Huson, and W. Thurston. Three-dimensional orbifolds and space groups. C.J. Howe and M.A. Steel.
Molecules evolve on the eubacterial tree of life.
P.J. Lockhart, D.H. Huson and M.A. Steel. Invariable site models and their uses in phylogeny reconstruction. Constructing a three-dimensional orbifold from its fibrifold symbol. In preparation, 1999.