@article{10_4064_aa_81_4_387_398,
     author = {Kurt Girstmair},
     title = {Some linear relations between values of trigonometric functions at k\ensuremath{\pi}/n},
     journal = {Acta Arithmetica},
     pages = {387--398},
     publisher = {mathdoc},
     volume = {81},
     number = {4},
     year = {1997},
     doi = {10.4064/aa-81-4-387-398},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-81-4-387-398/}
}