@article{JIS_2003__6_4_a4,
     author = {Broughan,  Kevin A.},
     title = {Characterizing the sum of two cubes},
     journal = {Journal of integer sequences},
     year = {2003},
     volume = {6},
     number = {4},
     zbl = {1068.11022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2003__6_4_a4/}
}