@article{EJDE_2009__2009__a97,
     author = {Tyagi,  Jagmohan and Raghavendra,  Venkataramanarao},
     title = {An oscillation criteria for second-order nonlinear differential equations with functional arguments},
     journal = {Electronic journal of differential equations},
     year = {2009},
     volume = {2009},
     zbl = {1172.34335},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a97/}
}