Espín Ortíz CG, Ruiz EE, Rodríguez Rodríguez JL. Proposal, indicators linked to tourism sustainability in Pastaza, Ecuador. CD [Internet]. 2019Nov.8 [cited 2026Jun.15];3(4.1):21-8. Available from: https://doi.org/10.33262/cienciadigital.v3i4.1.972