The Fifth Taxicab Number is 48988659276962496
- David W. Wilson's article on his search for the smallest integer that can be expressed as a sum of two positive cubes in 5 distinct ways, up to order of summands.
- http://www.cs.uwaterloo.ca/journals/JIS/wilson10.html

Taxicab Numbers
- David W. Wilson's list of the smallest number that can be expressed as a sum of two positive cubes in n different ways, for n = 1 through 5.
- http://pi.lacim.uqam.ca/eng/problem_en.html

Overview of Mathematician Secret Room
- Page keeping track of solutions of x^3+y^3+z^3 < 1000 and x^3+y^3+2*z^3 < 1000.
- http://www.asahi-net.or.jp/~KC2H-MSM/mathland/overview.htm

Sortedsums
- D. J. Bernstein's collection of tools for enumerating small solutions to certain types of equal sums of like powers.
- http://cr.yp.to/sortedsums.html

Power Page
- Steve Dutch's page about powers of numbers.
- http://www.uwgb.edu/dutchs/RECMATH/rmpowers.htm

Tom's Mathematical Things
- Dissertation about equal sums of like powers by Tom Womack.
- http://tom.womack.net/maths/dissert_abstract.htm