Estima, D., Ventura, M., Rabinovici, A., & Martins, F. P. F. (2017). Constraints and contributions of Environmental Non-Governmental Organizations for the sustainability of tourism on islands: a case study from the Azores archipelago, Portugal. Journal of Tourism & Development, 1(27/28), 1627-1637. https://doi.org/10.34624/rtd.v1i27/28.10183