Sharma, P.R., and Gurminder Singh. “Unsteady Flow About a Stagnation Point on a Stretching Sheet in the Presence of Variable Free Stream”. Science & Technology Asia 13, no. 1 (October 29, 2015): 11–16. Accessed March 29, 2024. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41449.