New Techniques for Relevant Word Ranking and Extraction. - João Ventura 002; Joaquim Ferreira da Silva (EPIA Workshops, 2007)

Mining Concepts from Texts. - João Ventura 002; Joaquim Ferreira da Silva (ICCS, 2012)

Automatic Extraction of Explicit and Implicit Keywords to Build Document Descriptors. - João Ventura 002; Joaquim Ferreira da Silva (EPIA, 2013)

Using Clusters of Concepts to Extract Semantic Relations from Standalone Documents. - João Ventura 002; Joaquim Ferreira da Silva (EPIA, 2013)