%0 Journal Article %A Grammatikopoulos, Myron K. %A Ladas, G. %A Sficas, Yiannis G. %T Necessary and sufficient conditions for oscillation of delay equations with constant coefficients %J Czechoslovak Mathematical Journal %D 1987 %P 262-270 %V 37 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1987.102153/ %R 10.21136/CMJ.1987.102153 %G en %F 10_21136_CMJ_1987_102153