Camacho E, Sarmento Coelho MM. Valuation Methodology of return on investment for tourism promotion plans in outermost regions – Madeira Case Study. e3 journal [Internet]. 2020 Jul. 24 [cited 2026 Jun. 25];5(2):71-98. Available from: https://www.revistas.ponteditora.org/index.php/e3/article/view/251