[1] A. R. Aftabizadeh and J. Wiener:
Oscillatory and periodic solutions of an equation alternately of retarded and advanced type. Appl. Anal. 23 (1986), 219–231.
DOI 10.1080/00036818608839642 |
MR 0870489
[2] A. R. Aftabizadeh and J. Wiener:
Oscillatory and periodic solutions for systems of two first order linear differential equations with piecewise constant argument. Appl. Anal. 26 (1988), 327–333.
DOI 10.1080/00036818808839717 |
MR 0922978
[3] S. Busenderg and K. L. Cooke: Models of vertically transmitted diseases with sequential-continuous dynamics. In: Nonlinear Phenomena in Mathematical Science, V. Lakshmikantham (ed.), Academic Press, New York, 1982, pp. 179–187.
[7] S. M. Shah and J. Wiener:
Advanced differential equations with piecewise constant argument deviations. Internat. J. Math. Sci. 6 (1983), 671–703.
MR 0729389