@article{10_1155_S0161171202007019,
     author = {El-Bassiouny, A.F.},
     title = {Parametrically excited nonlinear systems: {A} comparison of two methods.},
     journal = {International Journal of Mathematics and Mathematical Sciences},
     pages = {739},
     publisher = {mathdoc},
     volume = {32},
     number = {12},
     year = {2002},
     doi = {10.1155/S0161171202007019},
     zbl = {1012.65141},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.1155/S0161171202007019/}
}