MathSciNet bibliographic data MR77700 (17,1080a) 42.2X Zygmund, A. On the Littlewood-Paley function $g\sp *(\theta)$$g\sp *(\theta)$. Proc. Nat. Acad. Sci. U. S. A. 42 (1956), 208–212. Links to the journal or article are not yet available

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