Fractional quantum Hall effect in second subband of a 2DES - Duarte, Celso de Araujo; Silva, Euzi Conceição Fernandes da; Gusev, Guennadii Michailovich; Gomez Armas, Luis Enrique; Bakarov, Askhat K; Wiedmann, Stefen Robert; Portal, Jean-Claude (Encontro de Física, 2011)