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Presented in part to the American Mathematical Society in June, 1970 and November, 1974.
A portion of this research was supported by the National Science Foundation, Grant GP-11580.
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Janowitz, M.F. A note on Rickart rings and semi-Boolean algebras. Algebra Universalis 6, 9–12 (1976). https://doi.org/10.1007/BF02485810
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DOI: https://doi.org/10.1007/BF02485810