@article{EJDE_2013__2013__a17,
     author = {Yang, Jichen and Liu, Anping and Liu, Guangjie},
     title = {Oscillation of solutions to neutral nonlinear impulsive hyperbolic equations with several delays},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2013},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a17/}
}