@article{COCV_2003__9__231_0,
     author = {V\'azquez, Juan Luis},
     title = {The nonlinearly damped oscillator},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {231--246},
     publisher = {EDP-Sciences},
     volume = {9},
     year = {2003},
     doi = {10.1051/cocv:2003006},
     mrnumber = {1966532},
     zbl = {1076.34038},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/cocv:2003006/}
}