• https://repositorio.usm.cl/entities/tesis/807966b4-86cc-40df-8a69-5e7e74863b76
• https://repositorio.usm.cl/entities/tesis/3ed030e8-c242-48fe-8553-56c4ebf96216
• https://repositorio.usm.cl/entities/tesis/714f495b-28c8-4c21-b0b3-455fb8b00316
• https://repositorio.usm.cl/entities/tesis/8a9fe402-3109-4069-a30f-97a9b7f664c6
• https://repositorio.usm.cl/entities/tesis/b7ac3557-bcc8-4789-9bc8-d4e4db56e77b