Yadav, K., and J. P. Jaiswal. “Solution of a Class of Fourth Order Singular Singularly Perturbed Boundary Value Problems by Haar Wavelets Method and Quintic B-Spline Method”. Journal of Informatics and Mathematical Sciences, vol. 9, no. 3, Oct. 2017, pp. 699-10, doi:10.26713/jims.v9i3.818.