Camacho, Elvio, and Maria Manuela Sarmento Coelho. 2020. “Valuation Methodology of Return on Investment for Tourism Promotion Plans in Outermost Regions – Madeira Case Study”. E3 — Revista De Economia, Empresas E Empreendedores Na CPLP 5 (2):71-98. https://doi.org/10.29073/e3.v5i2.251.