L. Antiqueira, и L. Zhao. 2013 BRICS Congress on Computational Intelligence and 11th Brazilian Congress on Computational Intelligence (BRICS-CCI CBIC), стр. 46-54. Ipojuca, Brazil, (сентября 2013)
R. Ribaldo, A. Akabane, L. Rino, и T. Pardo. Computational Processing of the Portuguese Language, том 7243 из Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2012)