Time series study of EUV spicules observed by SUMER/SoHO L. D. Xia, M. D. Popescu, J. G. Doyle and J. Giannikakis A&A, 438 3 (2005) 1115-1122 Published online: 18 July 2005 DOI: 10.1051/0004-6361:20042579