@article{AIHPC_2009__26_6_2481_0,
     author = {Rossi, Luca},
     title = {Liouville {Type} {Results} for {Periodic} and {Almost} {Periodic} {Linear} {Operators}},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {2481--2502},
     publisher = {Elsevier},
     volume = {26},
     number = {6},
     year = {2009},
     doi = {10.1016/j.anihpc.2009.07.001},
     mrnumber = {2569904},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2009.07.001/}
}