Luís SarmentoPaula CarvalhoMário J. SilvaE. Oliveira2010-05-212014-11-142010-05-212014-11-1420092009http://hdl.handle.net/10451/14858http://repositorio.ul.pt/handle/10455/6438engComputer ScienceAutomatic Creation of a Reference Corpus for Political Opinion Mining in User-Generated Contentjournal article