Potekho, A. On the question of Abel’s summability method for eigenfunction expansions. (Russian. English summary) Zbl 0693.40011 Differ. Uravn. Primen. 42, 65-73 (1988). MSC: 40G10 42C15 PDFBibTeX XMLCite \textit{A. Potekho}, Differ. Uravn. Primen. 42, 65--73 (1988; Zbl 0693.40011)
Stupyalis, Lyudvikos Boundedness of singular integral operators in weighted spaces. (Russian. English summary) Zbl 0578.42011 Differ. Uravn. Primen. 33, 110-116 (1983). MSC: 42B20 PDFBibTeX XMLCite \textit{L. Stupyalis}, Differ. Uravn. Primen. 33, 110--116 (1983; Zbl 0578.42011)