"Ken-ichi Sasaki,Riichiro Saito,M. S. Dresselhaus,Shuichi Murakami,Kazuyuki Takai,Takanori Mori,Toshiaki Enoki","Kohn Anomalies in Graphene Nanoribbons",,"Phys. Rev. B","The American Physical Society","Vol. 80",,"pp. 1249-1254",2009,Oct.