Salgado, M., Oliveira, I. P., Martins, J. A. (2019).
Hiking in the alva river: Water routes,Pedestrianismo no vale do alva: Rotas de água.
Journal of Tourism and Development, 32, 143-157.
Retrieved from http://www.scopus.com/inward/record.url?eid=2-s2.0-85076739528&partnerID=MN8TOARS