@article{10_4064_aa163_2_4,
     author = {Tsz Ho Chan},
     title = {Factors of a perfect square},
     journal = {Acta Arithmetica},
     pages = {141--143},
     publisher = {mathdoc},
     volume = {163},
     number = {2},
     year = {2014},
     doi = {10.4064/aa163-2-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa163-2-4/}
}