MathSciNet bibliographic data MR1037228 42A28 (30B30 46J15) Zerouali, Elhassan Estimates for inverses of \$e\sp {int}\$$e\sp {int}$ in some quotient algebras of \$A\sp +\$$A\sp +$. Proc. Amer. Math. Soc. 112 (1991), no. 3, 789–793. Article

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