@article{EJDE_2007__2007__a129,
     author = {Philos,  Christos G. and Purnaras,  Ioannis K.},
     title = {Behavior of the solutions to second order linear autonomous delay differential equations},
     journal = {Electronic journal of differential equations},
     year = {2007},
     volume = {2007},
     zbl = {1138.34350},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a129/}
}