BIRKENMEIER, G. F.; HEATHERLY, H. E.; LEE, E. K. S. SPECIAL RADICALS FOR NEAR-RING. Tamkang Journal of Mathematics, [S. l.], v. 27, n. 4, p. 281–288, 1996. DOI: 10.5556/j.tkjm.27.1996.3956. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/3956. Acesso em: 4 may. 2024.