@article{10_4064_aa101_2_9,
     author = {Paulo Ribenboim},
     title = {The square-free kernel of $x^{2^n}-a^{2^n}$},
     journal = {Acta Arithmetica},
     pages = {189--197},
     publisher = {mathdoc},
     volume = {101},
     number = {2},
     year = {2002},
     doi = {10.4064/aa101-2-9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa101-2-9/}
}