@article{10_21136_CMJ_1984_101922,
     author = {Grace, Said R. and Lalli, Bikkar S.},
     title = {An oscillation criterion for $n$-th order nonlinear differential equations with retarded arguments},
     journal = {Czechoslovak Mathematical Journal},
     pages = {18--21},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1984},
     doi = {10.21136/CMJ.1984.101922},
     mrnumber = {731976},
     zbl = {0543.34056},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1984.101922/}
}