Vladimir Arnold wrote quite a bit on such things. For example: http://pauli.uni-muenster.de/~munsteg/arnold.html http://pauli.uni-muenster.de/~munsteg/arnold.ht

Vladimir Arnold wrote quite a bit on such things. For example: http://pauli.uni-muenster.de/~munsteg/arnold.html http://pauli.uni-muenster.de/~munsteg/arnold.html, as well as other articles.