@article{00005064,
title = {Strong oscillations for second order nonlinear functional differential equations.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {13},
year = {1990},
pages = {151-158},
doi = {10.1155/S0161171290000205},
zbl = {0755.34067},
language = {en},
url = {http://dml.mathdoc.fr/item/00005064}
}
Yan, Jurang. Strong oscillations for second order nonlinear functional differential equations.. International Journal of Mathematics and Mathematical Sciences, Tome 13 (1990) pp. 151-158. doi : 10.1155/S0161171290000205. http://gdmltest.u-ga.fr/item/00005064/