Duffin, R. J. The reciprocal of a Fourier series. (English) Zbl 0113.27301 Proc. Am. Math. Soc. 13, 965-970 (1962). PDFBibTeX XMLCite \textit{R. J. Duffin}, Proc. Am. Math. Soc. 13, 965--970 (1962; Zbl 0113.27301) Full Text: DOI
Duffin, R. J.; Nehari, Zeev Note on polyharmonic functions. (English) Zbl 0097.08504 Proc. Am. Math. Soc. 12, 110-115 (1961). PDFBibTeX XMLCite \textit{R. J. Duffin} and \textit{Z. Nehari}, Proc. Am. Math. Soc. 12, 110--115 (1961; Zbl 0097.08504) Full Text: DOI
Duffin, R. J. Representation of Fourier integrals as sums. III. (English) Zbl 0078.09804 Proc. Am. Math. Soc. 8, 272-277 (1957). PDFBibTeX XMLCite \textit{R. J. Duffin}, Proc. Am. Math. Soc. 8, 272--277 (1957; Zbl 0078.09804) Full Text: DOI
Duffin, R. J. Two-dimensional Hilbert transforms. (English) Zbl 0077.30605 Proc. Am. Math. Soc. 8, 239-245 (1957). PDFBibTeX XMLCite \textit{R. J. Duffin}, Proc. Am. Math. Soc. 8, 239--245 (1957; Zbl 0077.30605) Full Text: DOI
Duffin, R. J. Exponential decay in nonlinear networks. (English) Zbl 0077.08905 Proc. Am. Math. Soc. 7, 1094-1106 (1957). PDFBibTeX XMLCite \textit{R. J. Duffin}, Proc. Am. Math. Soc. 7, 1094--1106 (1957; Zbl 0077.08905) Full Text: DOI
Duffin, R. J. Representation of Fourier integrals as sums. II. (English) Zbl 0037.19802 Proc. Am. Math. Soc. 1, 250-255 (1950). PDFBibTeX XMLCite \textit{R. J. Duffin}, Proc. Am. Math. Soc. 1, 250--255 (1950; Zbl 0037.19802) Full Text: DOI
Duffin, R. J. Nonlinear networks. IV. (English) Zbl 0036.41601 Proc. Am. Math. Soc. 1, 233-240 (1950). PDFBibTeX XMLCite \textit{R. J. Duffin}, Proc. Am. Math. Soc. 1, 233--240 (1950; Zbl 0036.41601) Full Text: DOI