"Francesco Calogero, Department of Physics, University of Rome ""La Sapienza"""
An interesting reading offering the possibility to explore a new and beautiful direction. Adrian Constantin, University of Lund The book is full of character and written in a colloquial manner. Overall, I did enjoy reading this book and I warmly recommend it to all researchers interested in dynamical systems, in particular integrable and super-integrable systems. Cristina Stoica, Mathematical Reviews