[1] Kokotovic, P.V., Khalil, H.K., O’Reilly, J.,
Singular perturbation methods in control: analysis and design, Academic Press, New York, 1986.
[2] Stein, R.B., A theoretical analysis of neuronal variability,
Biophysical Journal, 5(2), 1965, 173-194.
[3] Stein, R.B., Some models of neuronal variability,
Biophysical Journal, 7(1), 1967, 37-68.
[4] Tuckwell, H.C.,
Introduction to Theoretical Neurobiology, Cambridge University Press, Cam-bridge, UK, 1988.
[5] Wilbur, W.J., Rinzel, J., An analysis of Stein’s model for stochastic neuronal excitation,
Biological Cybernetics, 45(2), 1982, 107–114.
[6] Farrell, P.A., Hegarty, A.F., Miller, J.J.H., O’Riordan, E., Shishkin, G.I., Robust
Computational Techniques for Boundary Layers, CHAPMAN & HALL/CRC, Boca Ratan, 2000.
[7] Miller, J.J.H., O’Riordan, E., Shishkin, G.I.,
Fitted Numerical Methods for Singular Perturbation Problems, World Scientific Co, Singapore, 2012.
[8] Mohapatra, J., Natesan, S., Uniform convergence analysis of finite difference scheme for singularly perturbed delay differential equation on an adaptively generated grid,
Numerical Mathematics: Theory, Methods and Applications, 3(1), 2010, 1-22.
[9] Swamy, D.K., Phaneendra, K., Babu, A.B., Reddy, Y.N., Computational method for singularly perturbed delay differential equations with twin or oscillatory behaviour,
Ain Shams Engineering Journal, 6(1),2015, 391-398.
[10] Lange, C.G., Miura, R.M., Singular perturbation analysis of boundary value problems for differential-difference equation,
SIAM Journal on Applied Mathematics, 42(3), 1982, 502-531.
[11] Lange, C.G., Miura, R.M., Singular perturbation analysis of boundary-value problems for differential-difference equations, III. Turning point problems,
SIAM Journal on Applied Mathematics, 45(5), 1985, 708-734.
[12] Lange, C.G., Miura, R.M., Singular perturbation analysis of boundary-value problems for differential-difference equations, V. Small shifts with layer behavior,
SIAM Journal on Applied Mathematics, 54(1), 1994, 249-272.
[13] Kadalbajoo, M.K., Sharma, K.K., Numerical analysis of boundary-value problem for singularly perturbed differential-difference equations: small shifts of mixed type,
Journal of Optimization Theory & Application, 115(1), 2002, 145-163.
[14] Kadalbajoo, M.K., Sharma, K.K., ε-uniform fitted mesh method for singularly perturbed differential-difference equations: mixed type of shifts with layer behavior,
International Journal of computer Mathematics, 81(1), 2004, 49-62.
[15] Kadalbajoo, M.K., Sharma, K.K., Numerical treatment of a mathematical model arising from a model of neuronal variability,
Journal of Mathematical Analysis and Applications, 307(2), 2005, 606-627.
[16] Rao, R.N., Chakravarthy, P.P., A finite difference method for singularly perturbed differential-difference equations arising from a model of neuronal variability,
Journal of Taibah University for Science, 7(3), 2013, 128-136.
[17] Rao, R.N., Chakravarthy, P.P., A finite difference method for singularly perturbed differential-difference equations with layer and oscillatory behavior,
Applied Mathematical Modelling, 37(8), 2013, 5743-5755.
[18] Rao, R.N., Chakravarthy, P.P., An exponentially fitted tridiagonal finite difference method for singularly perturbed differential-difference equations with small shifts,
Ain Shams Engineering Journal, 5(4),2014, 1351-1360.
[19] Mohapatra, J., Natesan, S., Uniformly convergent numerical method for singularly perturbed differential-difference equation using grid equidistribution,
International Journal for Numerical Methods in Biomedical Engineering, 27(9), 2011, 1427-1445.
[20] Duressa, G., Reddy, Y.N., Domain decomposition method for singularly perturbed differential difference equations with layer behavior,
International Journal of Engineering & Applied Sciences, 7(1), 2015, 86-102.
[21] Sirisha, L., Phaneendra, K., Reddy, Y.N., Mixed finite difference method for singularly perturbed differential difference equations with mixed shifts via domain decomposition,
Ain Shams Engineering Journal, 9(4),2018, 647-654.
[22] Natesan, S., Bawa, R.K., Second-order numerical scheme for singularly perturbed reaction-diffusion Robin problems, Journal of Numerical Analysis,
Industrial and Applied Mathematics, 2(3-4), 2007, 177-192.
[23] Priyadharshini, R.M., Ramanujam, N., Valanarasu, T., Hybrid difference schemes for singularly perturbed problem of mixed type with discontinuous source term,
Journal of Applied Mathematics & Informatics, 28(5), 2010, 1035-1054.
[24] Mukherjee, K., Parameter-uniform improved hybrid numerical scheme for singularly perturbed problems with interior layers,
Mathematical Modelling and Analysis, 23(2), 2018, 167-189.
[25] Li, G., Qiu, J., Hybrid weighted essentially non-oscillatory schemes with different indicators.
Journal of Computational Physics, 229(21), 2010, 8105-8129.
[26] Li, G., Xing, Y., Well-balanced finite difference weighted essentially non-oscillatory schemes for the Euler equations with static gravitational fields.
Computers & Mathematics with Applications, 75(6), 2018, 2071-2085.
[27] Dona, W.S., Lib, P., Wongc, K.Y., Gaod, Z., Symmetry-Preserving Property of High Order Weighted Essentially Non-Oscillatory Finite Difference Schemes for Hyperbolic Conservation Laws.
Journal of Computational Physics, 2017.
[28] Zhu, H., Gao, Z., An h-adaptive RKDG method with troubled-cell indicator for one-dimensional detonation wave simulations.
Advances in Computational Mathematics, 42(5), 2016, 1081-1102.
[29] Kellogg, R.B., Tsan, A., Analysis of some difference approximations for a singular perturbation problem without turning points.
Mathematics of Computation, 32(144), 1978, 1025-1039.
[30] Stynes, M., Roos, H.G., The midpoint upwind scheme,
Applied Numerical Mathematics, 23(3), 1997, 361-374.
[31] Ramesh, V.P., Kadalbajoo, M.K., Upwind and midpoint upwind difference methods for time-dependent differential difference equations with layer behaviour,
Applied Mathematics and Computation, 202(2), 2008, 453-471.