@article{TM2_2013_XVI_2_a2,
     author = {Samuel G. Moreno and Esther M. Garc{\'\i}a-Caballero},
     title = {To be integer or not to be rational: that is the questio$\sqrt{N}$},
     journal = {The Teaching of Mathematics},
     pages = {79 },
     publisher = {mathdoc},
     volume = {XVI},
     number = {2},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM2_2013_XVI_2_a2/}
}