@article{AIHPA_1999__71_3_241_0,
     author = {Duclos, P. and \v{S}\v{t}ov{\'\i}\v{c}ek, P. and Vittot, M.},
     title = {Perturbation of an eigen-value from a dense point spectrum : a general {Floquet} hamiltonian},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {241--301},
     publisher = {Gauthier-Villars},
     volume = {71},
     number = {3},
     year = {1999},
     mrnumber = {1714346},
     zbl = {0972.81041},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1999__71_3_241_0/}
}