https://www.scirp.org/reference/ReferencesPapers?ReferenceID=2259000
Kumar, D., Yadaw, A.S. and Kadalbajoo, M.K. (2013) A Parameter-Uniform Method for Two Parameters...
Kumar, D., Yadaw, A.S. and Kadalbajoo, M.K. (2013) A Parameter-Uniform Method for Two Parameters Singularly Perturbed Boundary Value Problems via Asymptotic...