Exponentially Small Lower Bounds for the Splitting of Separatrices to Whiskered Tori with Frequencies of Constant Type. - Amadeu Delshams; Marina Gonchenko; Pere Gutiérrez (Int. J. Bifurc. Chaos, 2014)

Exponentially Small Splitting of Separatrices and Transversality Associated to Whiskered Tori with Quadratic Frequency Ratio. - Amadeu Delshams; Marina Gonchenko; Pere Gutiérrez (SIAM J. Appl. Dyn. Syst., 2016)