Wannisa Apairat และ Sompong Chuysurichay. (2018) Existence of Moore-Penrose inverses in rings with involution. <i>Songklanakarin Journal of Science and Technology</i>, <i>40</i>(5), 1061-1065.Wannisa Apairat และ Sompong Chuysurichay. "Existence of Moore-Penrose inverses in rings with involution". Songklanakarin Journal of Science and Technology 40 (2018):1061-1065.Wannisa Apairat และ Sompong Chuysurichay. Existence of Moore-Penrose inverses in rings with involution. Research and Development Office, Prince of Songkla University:ม.ป.ท. 2018.