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2. G. B. Mathews, Theory of Numbers. Cambridge 1892, New York, 1927, p. 318.
3. N. G. W. H. Beeger, “On the congruence (𝑝-1)!≡-1(\bmod{𝑝²}),” Messenger of Math., v. 49, p. 177-178, 1920.
4. Partition theory and thermodynamics of multi-dimensional oscillator assemblies;Nanda, V. S.;Proc. Cambridge Philos. Soc.,1951
5. K. Pearson, Tables of the Incomplete Γ-function. London, 1934.