不定和分
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Markus Müller. How to Add a Non-Integer Number of Terms, and How to Produce Unusual Infinite Summations
Markus Mueller, Dierk Schleicher. Fractional Sums and Euler-like Identities
S. P. Polyakov. Indefinite summation of rational functions with additional minimization of the summable part. Programmirovanie, 2008, Vol. 34, No. 2.
"Finite-Difference Equations And Simulations", Francis B. Hildebrand, Prenctice-Hall, 1968