Plasmas in the universe : proceedings of the International School of Physics "Enrico Fermi", course CXLII, Varenna on Lake Como, Villa Monastero, 6-16 July 1999 - Coppi, B.; Ferrari, A. (Attilio), 1941-; Sindoni, E. (Elio) (Proceedings of the International School of Physics "Enrico Fermi" ;, 2000)