1. Doolan, E.P., Miller, J.J.H., Schilders, W.H.A.: Uniform Numerical Methods for Problems with Initial and Boundary Layers. Boole, Dublin (1980)
2. Farrell, P.A., Hegarty, A.F., O’Riordan, E., Shishkin, G.I.: Robust Computational Techniques for Boundary Layers. Chapman Hall/ CRC, Boca Raton (2000)
3. Farrell, P. A., Miller, J. J. H., O’Riordan, E., Shishkin, G. I.: Singularly perturbed differential equations with discontinuous source terms, Appeared in Proceedings of Workshop’98, Lozenetx, Bulgaria, Aug 27–31, 147–156 (1998).
4. Miller, J.J.H.: O’ Riordan, E., Shishkin, G.I., Wang, S.: A parameter-uniform Schwartz method for a singularly perturbed reaction-diffusion problem with an interior layer. J Appl. Numer. Math. 35(4), 323–337 (2000)
5. Adzic, N., Ovcic, Z.: Approximate solution for SPP with discontinuous source term. J. Theoret. Appl. Mech. 31(2), 215–234 (2004)