@article{MS2_1983__53_166862,
     author = {Helge Tverberg},
     title = {On cubic factors of certain trinominals.},
     journal = {Mathematica Scandinavica},
     pages = {178--184},
     publisher = {mathdoc},
     volume = {53},
     year = {1983},
     zbl = {0513.12003},
     url = {http://geodesic.mathdoc.fr/item/MS2_1983__53_166862/}
}