J. Mohapatra and N. Srinivasan,"Parameter-uniform numerical method for global solution and global normalized flux of singularly perturbed boundary value problems using grid equidistribution", Computers & Mathematics with Applications, vol.60, no.7, pp.1924-1939, Elsevier, August 2010, https://doi.org/10.1016/j.camwa.2010.07.026       Article