Arnon Ploymukda และ Pattrawut Chansangiam. (2019) Algebraic, order, and analytic properties of Tracy-Singh sums for Hilbert space operators. <i>Songklanakarin Journal of Science and Technology</i>, <i>41</i>(4), 727-733.Arnon Ploymukda และ Pattrawut Chansangiam. "Algebraic, order, and analytic properties of Tracy-Singh sums for Hilbert space operators". Songklanakarin Journal of Science and Technology 41 (2019):727-733.Arnon Ploymukda และ Pattrawut Chansangiam. Algebraic, order, and analytic properties of Tracy-Singh sums for Hilbert space operators. Research and Development Office, Prince of Songkla University:ม.ป.ท. 2019.