1-4 of 4 Books

KdV & KAM
By Thomas Kappeler,Thomas Kappeler,Jürgen Pöschel

Darboux transformations in integrable systems
By Chaohao Gu,Hesheng Hu,Zixiang Zhou

Nonlinear dynamics
By M. Lakshmanan,Muthusamy Lakshmanan,Shanmuganathan Rajaseekar

A memoir on integrable systems
By Y. N. Fedorov,Yu.N. Fedorov,V.V. Kozlov