@article{AIHPA_1989__50_3_229_0,
     author = {Huang, Min-Jei},
     title = {On stability for time-periodic perturbations of harmonic oscillators},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {229--238},
     publisher = {Gauthier-Villars},
     volume = {50},
     number = {3},
     year = {1989},
     mrnumber = {1017964},
     zbl = {0693.34063},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1989__50_3_229_0/}
}