%0 Journal Article %A Oleg Evnin %T Breathing Modes, Quartic Nonlinearities and Effective Resonant Systems %J Symmetry, integrability and geometry: methods and applications %D 2020 %V 16 %U http://geodesic.mathdoc.fr/item/SIGMA_2020_16_a33/ %G en %F SIGMA_2020_16_a33