Iw. Rodrigues, SYSTEMS OF DIFFERENTIAL-EQUATIONS OF ALTERNATELY RETARDED AND ADVANCED TYPE, Journal of mathematical analysis and applications, 209(1), 1997, pp. 180-190
The main purpose of this paper is to study oscillatory and stability p
roperties of linear systems of differential equations with piecewise c
onstant argument in which the argument has a fixed point in each inter
val of a certain length. The results obtained solve a problem proposed
by I. Gyori and G. Ladas. (C) 1997 Academic Press.