@article{03605290,
title = {Necessary and sufficient conditions for eventually vanishing oscillatory solutions of functional equations with small delays.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {1},
year = {1978},
pages = {269-283},
doi = {10.1155/S0161171278000307},
zbl = {0389.34048},
language = {en},
url = {http://dml.mathdoc.fr/item/03605290}
}
Singh, Bhagat. Necessary and sufficient conditions for eventually vanishing oscillatory solutions of functional equations with small delays.. International Journal of Mathematics and Mathematical Sciences, Tome 1 (1978) pp. 269-283. doi : 10.1155/S0161171278000307. http://gdmltest.u-ga.fr/item/03605290/