フォン・ノイマン正則環
Goodearl, K. R. (1991), von Neumann regular rings (2nd ed.), Malabar, FL: Robert E. Krieger Publishing Co. Inc., pp. xviii+412, ISBN 0-89464-632-X, MR1150975, Zbl 0749.16001
L.A. Skornyakov (2001), “Regular ring (in the sense of von Neumann)”, in Hazewinkel, Michiel, Encyclopedia of Mathematics, Springer, ISBN 978-1-55608-010-4, https://www.encyclopediaofmath.org/index.php?title=Regular_ring_(in_the_sense_of_von_Neumann)