Alarcón-Paredes, D., Alonso-Silverio, G., Guzmán-Guzmán, I. P., Ventura-Molina, E., & Alarcón-Paredes, A. (2026). Progressive Transfer Learning in Hybrid CNN-Transformer Architectures for Robust Diabetic Retinopathy Grading. International Journal of Combinatorial Optimization Problems and Informatics, 18(1), 332–353. https://doi.org/10.61467/2007.1558.2027.v18i1.1532