Altamirano, G. C. ., and M. . Umar. “Numerical Study of the Casson Non-Newtonian Fluid Flow over a Nonlinear Stretching Sheet”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 48, no. 6, Dec. 2019, pp. 193-9, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/10518.