To be integer or not to be rational: that is the questio$\sqrt{N}$ 
Samuel G. Moreno and Esther M. Garc\'ıaCaballero 
Abstract Another proof is given of the fact that
the square root of a nonnegative integer is either an integer or an irrational.
Bibliography on this theme is presented.

Keywords: Rational and irrational numbers. 
Pages: 79$$81 
Volume XVI
, Issue 2
, 2013
