Wati, Marfungah, et al. “Application of EfficientNetV2-S Architecture With Focal Loss to Overcome Class Imbalances in Skin Cancer Classification”. International Journal of Advances in Data and Information Systems, vol. 7, no. 1, Apr. 2026, pp. 440-52, https://doi.org/10.59395/ijadis.v7i1.1524.