フォン・ノイマン正則環
von Neumann, John (1936), “On Regular Rings”, Proc. Nat. Acad. Sci. USA 22 (12): 707–712, doi:10.1073/pnas.22.12.707, JFM 62.1103.03, PMC 1076849, PMID 16577757, Zbl 0015.38802, http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1076849
von Neumann, John (1960), Continuous geometries, Princeton University Press, Zbl 0171.28003, https://books.google.com/books?id=onE5HncE-HgC