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@article{JRAM_1969__238_183510, author = {J.W.S. Cassels}, title = {On a conjecture of {R.M.} {Robinson} about sums of roots of unity.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {112--131}, publisher = {mathdoc}, volume = {238}, year = {1969}, zbl = {0179.35203}, url = {http://geodesic.mathdoc.fr/item/JRAM_1969__238_183510/} }
J.W.S. Cassels. On a conjecture of R.M. Robinson about sums of roots of unity.. Journal für die reine und angewandte Mathematik, Tome 238 (1969), pp. 112-131. http://geodesic.mathdoc.fr/item/JRAM_1969__238_183510/