Non resistive analysis of rotational instabilities in FRC and the Unicamp TC-1 m=4 results - Santiago, M A M; Assis, A S; Azevedo, C A; Sakanaka, P H; Machida, M; Aramaki, E; Berni, L A; Campos, Delton de Oliveira; Farias, R T (Brazilian Journal of Physics, 1998)