Cevallos-Culqui, Alex, Claudia Pons, and Gustavo Rodriguez. “Semi-Supervised Learning Models for Document Classification: A Systematic Review and Meta-Analysis”. Inteligencia Artificial 26, no. 72 (June 9, 2023): 81–111. Accessed February 22, 2024. http://www.journal.iberamia.org/index.php/intartif/article/view/871.