@article{GMJ_1999__6_3_48321,
     author = {Kordonis, I.-G.E. and Philos, Ch.G.},
     title = {Oscillation and nonoscillation in delay or advanced differential equations and in integrodifferential equations.},
     journal = {Georgian mathematical journal},
     pages = {263--284},
     year = {1999},
     volume = {6},
     number = {3},
     zbl = {0930.34050},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_1999__6_3_48321/}
}