Team, S. “The Fixed Point Property of a Non-Unital Abelian Banach Algebra Generated by an Element With Infinite Spectrum: Preeyaporn Thongin, Worapong Fupinwong”. Thai Journal of Mathematics, vol. 18, no. 3, Sept. 2020, pp. 1185–1197, https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1065.