@article{urn:eudml:doc:42637, title = {Oscillation of first order neutral diferential equations with positive and negative coefficients.}, journal = {Collectanea Mathematica}, volume = {50}, year = {1999}, pages = {199-209}, zbl = {0935.34055}, mrnumber = {MR1706239}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:42637} }
Li, Wantong; Yan, Jurang. Oscillation of first order neutral diferential equations with positive and negative coefficients.. Collectanea Mathematica, Tome 50 (1999) pp. 199-209. http://gdmltest.u-ga.fr/item/urn:eudml:doc:42637/