Splitting Potential and the Poincaré-Melnikov Method for Whiskered Tori in Hamiltonian Systems. - Amadeu Delshams; Pere Gutiérrez (J. Nonlinear Sci., 2000)

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)