• https://repositorio.pucp.edu.pe/items/aef8cdce-2541-4c0a-a329-e0945bc3060f
• https://repositorio.pucp.edu.pe/items/fc004ca3-2ecd-4b7c-846b-d91d2e34458c
• https://repositorio.pucp.edu.pe/items/a148a7ad-f185-43a0-99e8-07d6273873f4
• https://repositorio.pucp.edu.pe/items/59c932ed-9459-4e89-bb2c-a28a05cf022c
• https://repositorio.pucp.edu.pe/items/11e6acbf-ee77-4f25-b8ca-7190ab0cdcda
• https://repositorio.pucp.edu.pe/items/4228e197-85e2-40ae-920a-6fa932eddcfc
• https://repositorio.pucp.edu.pe/items/00b9aaf8-78e8-4d5b-8911-0fc030244ecb