@article{01751282,
title = {Nonautonomous differential equations of alternately retarded and advanced type.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {25},
year = {2001},
pages = {597-603},
doi = {10.1155/S0161171201005592},
zbl = {1004.34060},
language = {en},
url = {http://dml.mathdoc.fr/item/01751282}
}
Meng, Qiong; Yan, Jurang. Nonautonomous differential equations of alternately retarded and advanced type.. International Journal of Mathematics and Mathematical Sciences, Tome 25 (2001) pp. 597-603. doi : 10.1155/S0161171201005592. http://gdmltest.u-ga.fr/item/01751282/