• https://repositorio.unfv.edu.pe/items/fd8a9fda-416d-4939-8ec1-f53d0d62e578
• https://repositorio.unfv.edu.pe/items/28e8cc2d-783b-438c-8834-9325d4a2a90b
• https://repositorio.unfv.edu.pe/items/92735850-95b6-48f2-b440-1638ecf47b51