Stochastic magnetic field lines diffusion in a toroidal configuration (Tokamak) R. Tabet, H. Imrane, D. Saifaoui, A. Dezairi and F. Miskane Eur. Phys. J. AP, 12 2 (2000) 145-153 Published online: 15 November 2000 DOI: 10.1051/epjap:2000181