@article{10_4064_aa_30_3_229_240,
     author = {John Conway and A. Jones},
     title = {Trigonometric diophantine equations {(On} vanishing sums of roots of unity)},
     journal = {Acta Arithmetica},
     pages = {229--240},
     publisher = {mathdoc},
     volume = {30},
     number = {3},
     year = {1976},
     doi = {10.4064/aa-30-3-229-240},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-30-3-229-240/}
}