• http://repositorio.uide.edu.ec/handle/37000/3057
• http://repositorio.uide.edu.ec/handle/37000/3080
• http://repositorio.uide.edu.ec/handle/37000/3067
• http://repositorio.uide.edu.ec/handle/37000/3030
• http://repositorio.uide.edu.ec/handle/37000/3068
• http://repositorio.uide.edu.ec/handle/37000/3082
• http://repositorio.uide.edu.ec/handle/37000/3041
• http://repositorio.uide.edu.ec/handle/37000/3069
• http://repositorio.uide.edu.ec/handle/37000/3083
• http://repositorio.uide.edu.ec/handle/37000/3052
• http://repositorio.uide.edu.ec/handle/37000/3071
• http://repositorio.uide.edu.ec/handle/37000/3059
• http://repositorio.uide.edu.ec/handle/37000/3073
• http://repositorio.uide.edu.ec/handle/37000/3076
• http://repositorio.uide.edu.ec/handle/37000/3065