@article{EJDE_2009__2009__a13,
     author = {Tyagi, Jagmohan},
     title = {An oscillation theorem for a second order nonlinear differential equations with variable potential},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2009},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a13/}
}