From symbolic to sub-symbolic information in question classification. - João Pedro Carlos Gomes da Silva; Luísa Coheur; Ana Cristina Mendes; Andreas Wichert (Artif. Intell. Rev., 2011)

Dealing with unknown words in statistical machine translation. - João Pedro Carlos Gomes da Silva; Luísa Coheur; Ângela Costa; Isabel Trancoso (LREC, 2012)

Just.Ask - a Multi-pronged Approach to Question Answering. - Ana Cristina Mendes; Luísa Coheur; João Pedro Carlos Gomes da Silva; Hugo Rodrigues 001 (Int. J. Artif. Intell. Tools, 2013)