Stokalo, I. Z. [Bogolyubov, A. N.; Martynyuk, D. I.] Operatorenrechnung. Verallgemeinerungen und Anwendungen. (Operacionnoe iscislenie. Obobscenija i prilozenija.). (Russian) Zbl 0239.44001 Kiev: ”Naukova Dumka”. 303 p. (1972). MSC: 44A45 34A30 39A10 34Kxx 34Dxx 41A60 PDFBibTeX XML
Stark, E. L. On approximation improvement for trigonometric singular integrals by means of finite oscillation kernels with separated zeros. (English) Zbl 0234.42003 Konstruktiv. Teor. Funkts., Tr. Mezhdunarod. Konf., Varna 1970, 337-344 (1972). MSC: 42A10 42A05 41A60 39A10 42A20 PDFBibTeX XML