@article{10_4153_CMB_1983_006_0,
     author = {Grace, S. R. and Lalli, B. S.},
     title = {An {Oscillation} {Criterion} for nth {Order} {Non-Linear} {Differential} {Equations} with {Functional} {Arguments}},
     journal = {Canadian mathematical bulletin},
     pages = {35--40},
     year = {1983},
     volume = {26},
     number = {1},
     doi = {10.4153/CMB-1983-006-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1983-006-0/}
}