Incommensurability 
Bibliography
[1] Hans Rademacher, Otto Toeplitz, The enjoyment of mathematics, Dover, 1990
[2] E. J. Barbeau, Incommensurability proofs: a pattern that peters out, Mathematics Magazine, Vol. 56, No. 2, 1983
[3] Ivan Niven, Irrational numbers, The Carus Mathematical Monographs, 11, Mathematical Association of America, 1967
[4] Charles Hadlock, Field theory and its classical problems, The Carus Mathematical Monographs, 19, Mathematical Association of America, 1978
