@article{ARM_1988__24_2_a6,
     author = {Bartu\v{s}ek, Miroslav},
     title = {On proper oscillatory solutions of the nonlinear differential equations of the $n$-th order},
     journal = {Archivum mathematicum},
     pages = {89--98},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1988},
     mrnumber = {983227},
     zbl = {0705.34036},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1988__24_2_a6/}
}