@article{PIM_2000_N_S_68_82_a10,
     author = {Jelena V. Manojlovi\'c},
     title = {Integral {Averaging} {Techniques} for {Oscillation} of {Second} {Order} {Nonlinear} {Differentialequations} {With} {Damping}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {92 },
     publisher = {mathdoc},
     volume = {_N_S_68},
     number = {82},
     year = {2000},
     zbl = {1012.34032},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_2000_N_S_68_82_a10/}
}