@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/