▎ 摘　　要

We have determined phonon eigenvectors of graphene at high-symmetry points (Gamma and K) of the Brillouin zone. For the K point, we used Wigner's method of group projectors. For the Gamma point, we applied an alternative, simpler method. We compared our results with those published in the literature and found good agreement between them. The method is applicable to any structure that belongs to the honeycomb lattice.