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@article{ELMA_1978__33_141210, author = {Murray Silver}, title = {On the constructibility of rational angles.}, journal = {Elemente der Mathematik}, pages = {42--44}, publisher = {mathdoc}, volume = {33}, year = {1978}, zbl = {0382.51008}, url = {http://geodesic.mathdoc.fr/item/ELMA_1978__33_141210/} }
Murray Silver. On the constructibility of rational angles.. Elemente der Mathematik, Tome 33 (1978), pp. 42-44. http://geodesic.mathdoc.fr/item/ELMA_1978__33_141210/