• https://repositorio.unfv.edu.pe/items/76d381ca-4608-4f8f-9bc6-7e45ab49fc39
• https://repositorio.unfv.edu.pe/items/1b3b6c4d-f39b-4674-943c-79902913aac4
• https://repositorio.unfv.edu.pe/items/18ee6c81-407b-4a52-809b-3e42833bb85a
• https://repositorio.unfv.edu.pe/items/2481ae6e-49d4-4e13-9b75-88f5aade53a9