Parameter-uniform fitted mesh higher order finite difference scheme for singularly perturbed problem with an interior turning point. - Vikas Gupta; Sanjay Ku Sahoo; Ritesh Kumar Dubey (CoRR, 2019)

Robust higher order finite difference scheme for singularly perturbed turning point problem with two outflow boundary layers. - Vikas Gupta; Sanjay Ku Sahoo; Ritesh Kumar Dubey (Comput. Appl. Math., 2021)

An almost second-order robust computational technique for singularly perturbed parabolic turning point problem with an interior layer. - Sanjay Ku Sahoo; Vikas Gupta (Math. Comput. Simul., 2023)

A robust uniformly convergent finite difference scheme for the time-fractional singularly perturbed convection-diffusion problem. - Sanjay Ku Sahoo; Vikas Gupta (Comput. Math. Appl., 2023)

A robust higher-order finite difference technique for a time-fractional singularly perturbed problem. - Sanjay Ku Sahoo; Vikas Gupta; Shruti Dubey (Math. Comput. Simul., 2024)

Optimally accurate second-order numerical scheme on layer-resolving graded mesh for singularly-perturbed boundary turning point problems exhibiting power-of-type-1 and hybrid layers. - V. D. Liseikin; V. Gupta; Sanjay Ku Sahoo (Int. J. Comput. Math., 2025)