@article{hal-01403496,
author = {Celletti, A. and Fran\c coise , Jean-Pierre },
title = {Matrix-second order differential equations and chaotic Hamiltonian systems},
journal = {HAL},
volume = {1989},
number = {0},
year = {1989},
language = {en},
url = {http://dml.mathdoc.fr/item/hal-01403496}
}
Celletti, A.; Françoise , Jean-Pierre . Matrix-second order differential equations and chaotic Hamiltonian systems. HAL, Tome 1989 (1989) no. 0, . http://gdmltest.u-ga.fr/item/hal-01403496/