@article{JIS_2016__19_2_a7,
     author = {Tangsupphathawat, Pinthira and Laohakosol, Vichian},
     title = {Minimal polynomials of algebraic cosine values at rational multiples of $\pi $},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2016__19_2_a7/}
}