@article{10_4064_ap_60_2_137_144,
     author = {Witold Kosmala},
     title = {Oscillation of a forced higher order equation},
     journal = {Annales Polonici Mathematici},
     pages = {137--144},
     publisher = {mathdoc},
     volume = {60},
     number = {2},
     year = {1994},
     doi = {10.4064/ap-60-2-137-144},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-60-2-137-144/}
}