This Work undertaken in collaboration with my son David Poet.
We have discovered two new classes of integrable billiards, as reported in:
Confocal Conic Billiards D.A.Poet and R.R.W.Poet, Physics Letters A 271 (2000) 277-284. 3rd July 2000.
(Reprinted with permission from Elsevier Science. Single copies of this article can be downloaded and printed for the reader's personal research and study.)
We have co-authored a book on chaos theory which will be published in November 2011.