Theory of fusion plasmas : proceedings of the Joint Varenna-Lausanne International Workshop held at Villa Monastero, Varenna, Italy, 31 August-4 September, 1998 - Workshop on Theory of Fusion Plasmas; International School of Plasma Physics; Connor, J. W.; Sindoni, E. (Elio); Vaclavik, J. (International school of plasma physics "Piero Caldirola", 1999)