Databases and Natural Language Interfaces. - Porfírio P. Filipe; Nuno J. Mamede (JISBD, 2000)

Towards ubiquitous task management. - Porfírio P. Filipe; Nuno J. Mamede (INTERSPEECH, 2004)

Hybrid Knowledge Modeling for Ambient Intelligence. - Porfírio P. Filipe; Nuno J. Mamede (Universal Access in Ambient Intelligence Environments, 2006)

Ubiquitous Knowledge Modeling for Dialogue Systems. - Porfírio P. Filipe; Nuno J. Mamede (ICEIS (5), 2006)

A Framework to Integrate Ubiquitous Knowledge Modeling. - Porfírio P. Filipe; Nuno J. Mamede (LREC, 2006)

A Task Repository for Ambient Intelligence. - Porfírio P. Filipe; Nuno J. Mamede (NLDB, 2006)

An Adaptive Domain Knowledge Manager for Dialogue Systems. - Porfírio P. Filipe; Luís Morgado; Nuno J. Mamede (ICEIS (5), 2007)

Empirical Multi-Artifact Knowledge Modeling for Dialogue Systems. - Porfírio P. Filipe; Nuno J. Mamede (ICEIS (5), 2008)

Actualização de conhecimento em sistemas de diálogo. - Porfírio P. Filipe; João Ferreira 001 (WebMedia (Companion), 2008)

Indoor Domain Model for Dialogue Systems. - Porfírio P. Filipe; Nuno J. Mamede (HCI (7), 2009)

A Student Personal System for Bologna Process Mobility. - Porfírio P. Filipe; João C. Ferreira (KMIS, 2009)

Building an academic social network: for Bologna mobility. - António L. Jorge; Porfírio P. Filipe (SNS, 2010)

Taas - Ticketing as a Service. - João C. Ferreira; Porfírio P. Filipe; Carina Gomes; Gonçalo Cunha; João Rodrigo Silva (CLOSER, 2013)

Practical Information about Sustainable Mobility for Smart Cities. - Paulo M. Araújo; Pedro M. Tendeiro; Porfírio P. Filipe (SMARTGREENS, 2013)

Integra System. - João C. Ferreira; Porfírio P. Filipe; Paulo M. Martins (WEBIST, 2013)

Carpooling Systems Aggregation. - Porfírio P. Filipe; Rodrigo D. Moura (INTSYS, 2020)