https://ult.fmipa.uho.ac.id/wp-content/upgrade/
Amer, A. “Fekete-Szegö Inequality for Certain Subclass of Analytic Functions”. Journal of Humanitarian and Applied Sciences, vol. 2, no. 4, Dec. 2017, pp. 73-84, https://khsj.elmergib.edu.ly/index.php/jhas/article/view/65.