CISUC, Department of Informatics Engineering, University of Coimbra, Pólo II, Coimbra, Portugal.|CISUC, Department of Informatics Engineering, University of Coimbra, Pólo II, Coimbra, Portugal.|CISUC, Department of Informatics Engineering, University of Coimbra, Pólo II, Coimbra, Portugal.|CISUC, Department of Informatics Engineering, University of Coimbra, Pólo II, Coimbra, Portugal.|CISUC, Department of Informatics Engineering, University of Coimbra, Pólo II, Coimbra, Portugal.