@inproceedings{vitorio-etal-2017-investigating,
    title = "Investigating Opinion Mining through Language Varieties: a Case Study of {B}razilian and {E}uropean {P}ortuguese tweets",
    author = "Vit{\'o}rio, Douglas  and
      Souza, Ellen Polliana Ramos  and
      Pereira, Ingryd  and
      Oliveira, Adriano",
    editor = "Paetzold, Gustavo Henrique  and
      Pinheiro, Vl{\'a}dia",
    booktitle = "Proceedings of the 11th {B}razilian Symposium in Information and Human Language Technology",
    month = oct,
    year = "2017",
    address = "Uberl{\^a}ndia, Brazil",
    publisher = "Sociedade Brasileira de Computa{\c{c}}{\~a}o",
    url = "https://preview.aclanthology.org/Author-page-Marten-During-lu/W17-6607/",
    pages = "43--52"
}