1.
YEN C-T. ON RINGS SATISFYING BOTH OF 1-abc AND 1-cba BEING INVERTIBLE OR NONE. Tamkang J. Math. [Internet]. 1993 Sep. 1 [cited 2022 Aug. 11];24(3):317-21. Available from: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4503