@article{SIGMA_2020_16_a33,
     author = {Oleg Evnin},
     title = {Breathing {Modes,} {Quartic} {Nonlinearities} and {Effective} {Resonant} {Systems}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2020},
     volume = {16},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2020_16_a33/}
}