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On the unit sum number of some rings Get access Nahid Ashrafi, Nahid Ashrafi Search for other works by this author on: Oxford Academic Google Scholar Peter Vámos Peter Vámos Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Mathematics, Volume 56, Issue 1, March 2005, Pages 1–12, https://doi.org/10.1093/qmath/hah023 Published: 01 March 2005
Nahid Ashrafi (Tue,) studied this question.