Athira, Satheesh Kakkadan, Kaliappan Kamaraj, and Packia Prakassh Raaj Sam Johnson. 2023. “Algebraic Proofs of Characterizing Reverse Order Law for Closed Range Operators in Hilbert Spaces”. Eurasian Mathematical Journal 14 (3):08-25. https://emj.enu.kz/index.php/main/article/view/289.