L. Carlitz, Problem 795, Math. Mag, vol.44, p.107, 1971.

C. Jordan, Calculus of Finite Differences, 1950.

H. Prodinger, A Short Proof of Carlitz.s Bernoulli Number Identity, J. Integer Sequences, vol.17, 2014.

J. Chikhi, D. De-mathématiques, U. Val-d'essonne,-23, B. D. De-france,-91037, E. Cedex et al.,