@article{EJDE_2012__2012__a43,
     author = {Parasyuk,  Igor and Rustamova,  Anna},
     title = {Variational approach for weak quasiperiodic solutions of quasiperiodically excited {Lagrangian} systems on {Riemannian} manifolds},
     journal = {Electronic journal of differential equations},
     year = {2012},
     volume = {2012},
     zbl = {1260.37030},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a43/}
}