| Berkes I. On the convergence of Σcκƒ(nκx) / Berkes I., Weber M. - Providence: American Mathematical Society, 2009. - vii, 72 p. - (Memoirs of the American Mathematical Society; V.201, N 943 (second of 5 numbers)). - Bibliogr.: p.71-72. - ISBN 978-0-8218-4324-6; ISSN 0065-9266
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