No title
Yulij llyashenko ,and Cheristiane Rousseau
Normal Forms , Bifurcations and Finiteness Problems in Differential Equations - USA Kluwer Academic 2004 - 509
1-4020-1929-7
Normal Forms , Bifurcations and Finiteness Problems in Differential Equations - USA Kluwer Academic 2004 - 509
1-4020-1929-7