@article{SMJ2_2008_34_2_a2,
     author = {Elabbasy, E. M. and Elhaddad, W. W.},
     title = {Oscillation {Criteria} for {Nonlinear} {Differential} {Equations} of {Second} {Order} with {Damping} {Term}},
     journal = {Serdica Mathematical Journal},
     pages = {395--414},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2008_34_2_a2/}
}