@article{00977793,
title = {Criteria for oscillation of solutions of two-dimensional differential systems with deviating arguments.},
journal = {Memoirs on Differential Equations and Mathematical Physics},
volume = {6},
year = {1995},
pages = {119-120},
zbl = {0866.34058},
language = {en},
url = {http://dml.mathdoc.fr/item/00977793}
}
Koplatadze, R.; Partsvania, N. Criteria for oscillation of solutions of two-dimensional differential systems with deviating arguments.. Memoirs on Differential Equations and Mathematical Physics, Tome 6 (1995) pp. 119-120. http://gdmltest.u-ga.fr/item/00977793/