@article{10_4064_ap77_1_4,
     author = {Wan-Tong Li and S. H. Saker},
     title = {Oscillation of nonlinear neutral delay
differential equations with applications},
     journal = {Annales Polonici Mathematici},
     pages = {39--51},
     publisher = {mathdoc},
     volume = {77},
     number = {1},
     year = {2001},
     doi = {10.4064/ap77-1-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap77-1-4/}
}