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 A. Balog , K. A. Broughan and I. E. Shparlinski , ‘On the number of solutions of exponential congruences’, Acta Arith. 148 (2011), 93–103.
 L. Glebsky and I. Shparlinski , ‘Short cycles in repeated exponentiation modulo a prime’, Des. Codes Cryptogr. 56 (2010), 35–42.
 F. Q. Gouvea , p-adic Numbers: An Introduction, 2nd edn (Springer, Berlin, 1997).
 R. K. Guy , Unsolved Problems in Number Theory, 3rd edn (Springer, New York, 2004).
 J. Holden , ‘Fixed points and two-cycles of the discrete logarithm’, in: Algorithmic Number Theory (ANTS 2002), Lecture Notes in Computer Science, 2369 (eds. C. Fieker and D. R. Kohel ) (Springer, Berlin, 2002), pp. 405–415.
 J. Holden and P. Moree , ‘Some heuristics and results for small cycles of the discrete logarithm’, Math. Comp. 75 (2006), 419–449.
 N. Koblitz , p-adic Numbers, p-adic Analysis, and Zeta-Functions, 2nd edn (Springer, New York, 1984).
 M. Levin , C. Pomerance and K. Soundarajan , ‘Fixed points for discrete logarithms’, in: Algorithmic Number Theory (ANTS-IX), Lecture Notes in Computer Science, 6197 (eds. G. Hanrot , F. Morain and E. Thomé ) (Springer, Berlin, 2010), pp. 6–15.
 A. J. Menezes , P. C. van Oorschot and S. A. Vanstone , Handbook of Applied Cryptography (CRC Press, Boca Raton, FL, 1996).