BIRKENMEIER, GARY F., HENRY E. HEATHERLY, and ENOCH K. S. LEE. “SPECIAL RADICALS FOR NEAR-RING”. Tamkang Journal of Mathematics 27, no. 4 (December 1, 1996): 281–288. Accessed May 4, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/3956.