Ahmed, Mohiedeen, Abd El-Mohsen Badawy, Essam El-Seidy, and Ahmed Gaber. “On <u><i>PGK</i></u><sub>2</Sub>-Algebras and Perfect Extensions”. Contemporary Mathematics 6, no. 1 (January 13, 2025): 617–634. Accessed January 18, 2025. https://ojs.wiserpub.com/index.php/CM/article/view/5369.