Ensemble of heterogeneous classifiers applied to lithofacies classification using logs from different wells - Joacir Marques de Oliveira; Eulanda Miranda dos Santos; José Reginaldo Hughes Carvalho; Leyne Abuim de Vasconcelos Marques (The 2013 International Joint Conference on Neural Networks, IJCNN 2013, Dallas, TX, USA, August 4-9, 2013, 2013)