[1] Kiguradze, I. T. and Chanturia, T. A. (1985). Asymptotic Properties of Solutions of Nonautonomous Ordinary Differential Equations, Kluwer Academic Publishers, Dordrecht.
[2] Makay, G. and Terjeki, J. (1998). On the asymptotic behaviour ofthe pantograph equations. E. J. Qualitative Theory of DifferentialEquation, 2(2):pp. 1 – 12.
[3] Murakami, K. (1997). Asymptotic constancy for systems of delay differential equations. Nonlinear Analysis, Theory, Methods andApplications, 30:pp. 4595 – 4606.
[4] Oyelami, B.O.(2009). Oxygenandhaemoglobinpairmodelforsicklecell anaemia patients. African Journal of Physics, 2: pp. 132 – 148.
[5] Riley, K. F., Hobson, M. P., and Bence, S. J. (2002). Mathematical Methods for Physics and Engineering. Replica Press Pvt. Ltd,
Delhi.
[6] Esuabana, I. M. and Abasiekwere, U. A. (2018). On stability of first order linear impulsive differential equations,International Journal of Statistics and Applied, Mathematics,Volume 3, Issue 3C, 231-236.
[7] Abasiekwere, U. A., Esuabana, I. M., Isaac, I. O., Lipcsey, Z. (2018):Classification of Non-Oscillatory Solutions of Nonlinear Neutral Delay Impulsive Differential Equations,Global Journal of Science Frontier Research: Mathematics and Decision Sciences (USA), Volume18, Issue 1, 49-63.
[8] Abasiekwere, U. A., Esuabana, I. M. (2017). Oscillation Theorem for Second Order Neutral Delay DifferentialEquations with Impulses, International Journal of Mathematics Trends and Technology,Vol. 52(5), 330-333, doi:10.14445/22315373/IJMTT-V52P548.
[9] Abasiekwere, U. A., Esuabana, I. M., Isaac, I. O., Lipcsey, Z. (2018). Existence Theorem For Linear NeutralImpulsive Differential Equations of the Second Order, Communications and Applied Analysis, USA, Vol.22, No. 2, 135-147.
[10] Abasiekwere, U. A., Esuabana, I. M., Isaac, I. O., Lipcsey, Z., (2018): Oscillationsof Second order Impulsive Differential Equations with Advanced Arguments, Global Journal ofScience Frontier Research: Mathematics and Decision Sciences (USA), Volume 18, Issue 1, 25-32
[11] Dubeau, F. and Karrakchou, J. (2002). State–dependent impulsivedelay differential equations. Applied Mathematics Letters, 15:pp.333 – 338.
[12] Ladde, G. S., Lakshmikantham, V., and Zhang, B. G. (1989). Oscillation Theory of Differential Equations with Deviating Arguments.Maarcel-Dekker Inc., New York.
[13]Lakshmikantham, V., Bainov, D. D., and Simeonov, P. S. (1989).Theory of Impulsive Differential Equations. World Scientific, PublishingCompany Limited Singapore.
[14] Yan, J. (2004). Oscillation properties of a second order impulsive delay differential equation. Comp. and Math. with Applications,47:pp. 253 – 258.
[15] Coddington, A. E. and Levinson, N. (1955). Theory of Ordinary Differential Equations. McGraw–Hill Book Company New York.
[16] Kreyszig, E.(2008). Advanced Engineering Mathematics. JohnWileyand sons, Inc., New York.
[17] Zill, D. G. and Cullen, M. R. (2005). Differential Equations withBoundary–Value Problems. Thompson and Brooks, Cole TorontoCanada.