the differential system of neutral type; oscillatory solution; nonoscillatory solution
The purpose of this paper is to obtain oscillation criterions for the differential system of neutral type.
 Marušiak, P.: Oscillatory properties of functional differential systems of neutral type
. Czech Math. J. (to appear). MR 1258427
 Špániková, E.: Oscillatory properties of solutions of three-dimensional differential systems with deviating arguments
. Acta Math. Univ. Comen. LIV-LV (1988), 173-183. MR 1083211