@article{CMJ_2004__54_1_a6,
     author = {Luo, Zhiguo and Shen, Jianhua},
     title = {Oscillation and nonoscillation of neutral differential equations with positive and negative coefficients},
     journal = {Czechoslovak Mathematical Journal},
     pages = {79--93},
     publisher = {mathdoc},
     volume = {54},
     number = {1},
     year = {2004},
     mrnumber = {2040221},
     zbl = {1057.34079},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2004__54_1_a6/}
}