Finch, S. R. "Analysis of a Radical Expansion." §1.2.1 in Mathematical
Constants. Cambridge, England: Cambridge University Press, p. 8, 2003.Paris,
R. B. "An Asymptotic Approximation Connected with the Golden Number."
Amer. Math. Monthly94, 272-278, 1987.Plouffe, S. "The
Paris Constant." http://pi.lacim.uqam.ca/piDATA/paris.txt.Sloane,
N. J. A. Sequence A105415 in "The
On-Line Encyclopedia of Integer Sequences."