Artificial animals in virtual ecosystems. - Paulo Heleno; Manuel Próspero dos Santos (Comput. Networks, 1998)

VIP3D - an application of image processing technology for quality control in the food industry. - Bento A. Brázio Correia; Roger Davies; Paulo Heleno; João Dinis (ICIP (1), 2001)

A Machine Vision Quality Control System for Industrial Acrylic Fibre Production. - Paulo Heleno; Roger Davies; Bento A. Brázio Correia; João Dinis (EURASIP J. Adv. Signal Process., 2002)