@article{1183425613,
author = {Gronwall, T. H.},
title = {A sequence of polynomials connected with the $n$th roots of unity},
journal = {Bull. Amer. Math. Soc.},
volume = {27},
number = {9-10},
year = {1921},
pages = { 275-279},
language = {en},
url = {http://dml.mathdoc.fr/item/1183425613}
}
Gronwall, T. H. A sequence of polynomials connected with the $n$th roots of unity. Bull. Amer. Math. Soc., Tome 27 (1921) no. 9-10, pp. 275-279. http://gdmltest.u-ga.fr/item/1183425613/