Radio seismology of the outer solar corona T. V. Zaqarashvili, V. N. Melnik, A. I. Brazhenko, M. Panchenko, A. A. Konovalenko, A. V. Franzuzenko, V. V. Dorovskyy and H. O. Rucker A&A, 555 (2013) A55 Published online: 01 July 2013 DOI: 10.1051/0004-6361/201321548