MathSciNet bibliographic data MR694390 (85e:46017) 46B25 (43A15 46E99) Alspach, Dale E.; Matheson, Alec Projections onto translation-invariant subspaces of $L\sb{1}({\bf R})$$L\sb{1}({\bf R})$. Trans. Amer. Math. Soc. 277 (1983), no. 2, 815–823. Article

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