Zejnullahu, R.; Berisha, M. On the modulus of continuity and smoothness in \(L_ p\). (Russian) Zbl 0694.42005 Mat. Vesn. 40, No. 1, 81-84 (1988). Reviewer: A.L.Brodskij MSC: 42A10 46E30 41A17 26A15 PDF BibTeX XML Cite \textit{R. Zejnullahu} and \textit{M. Berisha}, Mat. Vesn. 40, No. 1, 81--84 (1988; Zbl 0694.42005)
Berisha, M.; Turku, H.; Rajović, M. Fourier coefficients of lacunary series of functions of class \(H(p,k,\varphi)\). (Serbo-Croatian. Russian summary) Zbl 0562.42009 Mat. Vesn. 36, 187-191 (1984). Reviewer: R.P.Boas MSC: 42A55 42A16 PDF BibTeX XML Cite \textit{M. Berisha} et al., Mat. Vesn. 36, 187--191 (1984; Zbl 0562.42009)
Berisha, M. Q. Estimates with the help of modulus of smoothness of the Fourier coefficients of functions of class H(p,k,phi). (Serbo-Croatian) Zbl 0524.42003 Mat. Vesn. 6(19)(34), 231-236 (1982). MSC: 42A16 46E35 PDF BibTeX XML Cite \textit{M. Q. Berisha}, Mat. Vesn. 6(19)(34), 231--236 (1982; Zbl 0524.42003)
Berisha, M. Q. Estimate of the Fourier coefficients of the periodic functions of class \(H(p,k,\varphi )\) by best approximations. (Serbo-Croatian. Russian summary) Zbl 0467.42006 Mat. Vesn. 4(17)(32), 1-7 (1980). Reviewer: V. Peller MSC: 42A16 42A32 PDF BibTeX XML Cite \textit{M. Q. Berisha}, Mat. Vesn. 4(17)(32), 1--7 (1980; Zbl 0467.42006)