Non-epileptic myoclonus and mitochondrial encephalomyopathy - Cukier, A; Naylor, F G M; Scapolan, H B; Vilela, M M; Aloe, F S; Siffert, J O; Tsanaclis, Ana Maria Crous; Hadda, M; Machado, T C; Alegro, M C; Levy, J A; Assis, L M (Arquivos de Neuro-Psiquiatria, 1989)