@article{CRMECA_2006__334_5_311_0,
     author = {Dimitrios E. Panayotounakos and Efstathios E. Theotokoglou and Michalis P. Markakis},
     title = {Exact analytic solutions for the damped {Duffing} nonlinear oscillator},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {311--316},
     publisher = {Elsevier},
     volume = {334},
     number = {5},
     year = {2006},
     doi = {10.1016/j.crme.2006.03.009},
     language = {en},
}