• https://repositorio.upn.edu.pe/items/0f3ea8d7-5e32-4dee-aef9-ac40eea62cd3
• https://repositorio.upn.edu.pe/items/d6df4e51-0403-4345-a1fc-8892a752d2f0
• https://repositorio.upn.edu.pe/items/2e77ec50-d3e5-4404-b702-f0d42eeffda3
• https://repositorio.upn.edu.pe/items/30c62919-96b4-4530-9a79-f13a3138175d
• https://repositorio.upn.edu.pe/items/c7fe747b-a868-412a-bd24-56f68dfacef4
• https://repositorio.upn.edu.pe/items/c25505cc-93d2-4a98-aaec-c27be87cf94c
• https://repositorio.upn.edu.pe/items/b52d2d04-8f2b-4dcd-a549-d3cb1951cf61
• https://repositorio.upn.edu.pe/items/35d31efd-2d8c-4838-9fe6-db0f1eec13bc
• https://repositorio.upn.edu.pe/items/0b8583e1-77bb-40cc-9d6f-56027d1d99ad
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• https://repositorio.upn.edu.pe/items/d657625f-4f37-4bf5-8fd1-2ece432d4a0b
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• https://repositorio.upn.edu.pe/items/81d4aca2-a3b9-47a6-9058-0f68057c02a5