Wikipedia page for User:Cullinane
Reflection groups: The missing link
Note of Nov. 11, 2007:
Thanks to Wikipedia administrator Charles Matthews and an anonymous user from New Delhi, India, a number of Wikipedia articles no longer contain references (admittedly self-promotional) to my own unpublished work. (See user talk.) Whether this improves the altered articles is not clear.
The link is to a page titled Kaleidoscope