He, J.-S., Tu, C.-Y., Marsch, E., Guo, L.-J., Yao, S., & Tian, H. (2009). Upward propagating high-frequency Alfvén waves as identified from dynamic wave-like spicules observed by SOT on Hinode. Astronomy and Astrophysics, 497, 525-535. doi:10.1051/0004-6361/200810777.