1. Department of Architecture, University of Coimbra, Ed. Colégio das Artes, Largo D. Dinis, 3000-143 Coimbra, Portugal
2. Centre for Earth and Space Research of the University of Coimbra, Coimbra, Portugal
3. Department of Mathematics, University of Coimbra, Largo D. Dinis, 3000-143, Coimbra, Portugal