Verbeeck, P. Rational approximations for exponential integrals \(E_ n(x)\). (English) Zbl 0216.23005 Acad. R. Belg., Bull. Cl. Sci., V. Ser. 56, 1064-1072 (1970). MSC: 65D15 Algorithms for approximation of functions PDFBibTeX XMLCite \textit{P. Verbeeck}, Bull. Cl. Sci., V. Sér., Acad. R. Belg. 56, 1064--1072 (1970; Zbl 0216.23005) Digital Library of Mathematical Functions: 3rd item ‣ §8.27(ii) Generalized Exponential Integral ‣ §8.27 Approximations ‣ Computation ‣ Chapter 8 Incomplete Gamma and Related Functions