[1] A.R. Aftabizadeh, J. Wiener and J.M. Xu:
Oscillatory and periodic solutions of delay differential equations with piecewise constant argument. Proc. Amer. Math. Soc. 99 (1987), 673–679.
DOI 10.1090/S0002-9939-1987-0877038-7 |
MR 0877038
[2] S. Busenberg and K. L. Cooke: Models of vertically transmitted diseases with sequential-continuous dynamics. Nonlinear Phenomena in Mathematical Sciences, V. Lakshmikantham (ed.), Academic Press, New York, 1982, pp. 179–187.
[7] G. Ladas, E.C. Partheniadis and J. Schinas:
Existence theorems for second order differential equations with piecewise constant argument. Differential Equations, Proceedings of the 1987 Equadiff Conference, Dekker, New York, 1989, pp. 389–395.
MR 1021739
[8] G. Ladas, E.C. Partheniadis and J. Schinas:
Oscillation and stability of second order differential equations with piecewise constant argument. Rad. Mat. 5 (1989), no. 1, 171–178.
MR 1012733
[10] G. Papaschinopoulos and J. Schinas:
Existence, stability and oscillation of the solutions of first order neutral delay differential equations with piecewise constant argument. Appl. Anal. 44 (1992), 99–111.
DOI 10.1080/00036819208840070 |
MR 1284772
[11] E.C. Partheniadis:
Stability and oscillation of neutral delay differential equations with piecewise constant argument. Differential Integral Equations 1 (1988), no. 4, 459–472.
MR 0945821 |
Zbl 0723.34059