23–24 ()*"RationalRootTheorem" at PlanetMath* Another proof that nth roots of integers are irrational, except for perfect nth powers by Scott E. Brodie*"The Rational Roots Test" at purplemath.com
23–24 ()==External links==*"RationalRootTheorem" at PlanetMath* Another proof that nth roots of integers are irrational, except for perfect nth powers by Scott E. Brodie*"The Rational Roots Test" at purplemath.com