Radial dependence of self-organized criticality behavior in TCABR tokamak - Lima, G Z dos Santos; Iarosz, K C; Batista, A M; Guimarães Filho, Zwinglio de Oliveira; Caldas, Iberê Luiz; Kuznetsov, Yu K; Nascimento, Ivan Cunha; Viana, R L; Lopes, S R (Physical Review Letters, 2011)