Almeida, C. C. de. “Concept Is a Sign: A Semiotic Element for Information Mediation and Document Analysis”. Scire: Knowledge Representation and Organization (ISSNe 2340-7042; ISSN 1135-3716), vol. 18, no. 2, Aug. 2012, pp. 49-55, doi:10.54886/scire.v18i2.3961.