J. de Souza, Y. Gumiel, L. Oliveira, and C. Moro. "Named Entity Recognition for Clinical Portuguese Corpus with Conditional Random Fields and Semantic Groups", in Anais do XIX Simpósio Brasileiro de Computação Aplicada à Saúde, Niterói, 2019, pp. 318-323, doi: https://doi.org/10.5753/sbcas.2019.6269.