Physical Review B - Condensed Matter and Materials Physics, 82-10, 2010 doi:10.1103/PhysRevB.82.104519
Yang L.X., Xie B.P., Zhang Y., He C., Ge Q.Q., Wang X.F., Chen X.H., Arita M., Jiang J., Shimada K., Taniguchi M., Vobornik I., Rossi G., Hu J.P., Lu D.H., Shen Z.X., Lu Z.Y., Feng D.L.