%0 Journal Article %A Ruan, Shigui %T Oscillations of Second Order Neutral Differential Equations %J Canadian mathematical bulletin %D 1993 %P 485-496 %V 36 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1993-064-4/ %R 10.4153/CMB-1993-064-4 %F 10_4153_CMB_1993_064_4