@article{SIGMA_2009_5_a16,
     author = {Andrei V. Smilga},
     title = {Comments on the {Dynamics} of the {Pais{\textendash}Uhlenbeck} {Oscillator}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2009},
     volume = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a16/}
}