@article{01331822,
title = {Oscillatory behaviour of solutions of two-dimensional differential systems with deviated arguments.},
journal = {Georgian Mathematical Journal},
volume = {6},
year = {1999},
pages = {335-346},
doi = {10.1023/A:1022913632464},
zbl = {0928.34048},
language = {en},
url = {http://dml.mathdoc.fr/item/01331822}
}
Koplatadze, R.; Partsvania, N. Oscillatory behaviour of solutions of two-dimensional differential systems with deviated arguments.. Georgian Mathematical Journal, Tome 6 (1999) pp. 335-346. doi : 10.1023/A:1022913632464. http://gdmltest.u-ga.fr/item/01331822/