%0 Journal Article %A Yiannis Sficas %T On some boundary value problems for first and second order delay differential equations %J Δελτίο της Ελληνικής Μαθηματικής Εταιρίας %D 1971 %P 127-137 %V 12 %N A %U http://geodesic.mathdoc.fr/item/DEME_1971_12_A_a11/ %G gr %F DEME_1971_12_A_a11