Guarda, Israel, and Maria Rosália Guerreiro. “Trees And Semi-Lattices: Analysing Space Configuration Of Two Urban Systems In Lisbon Region”. Journal of Tourism, Sustainability and Well-being 4, no. 3 (September 30, 2016): 185–198. Accessed October 27, 2025. https://journals.cinturs.pt/jtsw/article/view/71.