@article{10_4064_aa133_4_1,
     author = {Alan Filipin and Robert Tichy and Volker Ziegler},
     title = {On the quantitative unit sum number problem{\textemdash}an application of the subspace theorem},
     journal = {Acta Arithmetica},
     pages = {297--308},
     publisher = {mathdoc},
     volume = {133},
     number = {4},
     year = {2008},
     doi = {10.4064/aa133-4-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa133-4-1/}
}