@article{10_4153_CJM_1993_008_6,
     author = {Philos, CH. G. and Purnaras, I. K. and Sficas, Y. G.},
     title = {Oscillations in {Higher-Order} {Neutral} {Differential} {Equations}},
     journal = {Canadian journal of mathematics},
     pages = {132--158},
     year = {1993},
     volume = {45},
     number = {1},
     doi = {10.4153/CJM-1993-008-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1993-008-6/}
}