@article{ARM_1997__33_1-2_a12,
     author = {Gregu\v{s}, M.},
     title = {On a perturbed nonlinear third order differential equation},
     journal = {Archivum mathematicum},
     pages = {121--126},
     publisher = {mathdoc},
     volume = {33},
     number = {1-2},
     year = {1997},
     mrnumber = {1464306},
     zbl = {0914.34028},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1997__33_1-2_a12/}
}