Sinaga, B., Yuhandri, Y. and Nurcahyo, G.W. 2026. Development of cost-sensitive artificial neural network optimization in solving imbalanced multi-class classification problems. Eastern-European Journal of Enterprise Technologies. 2, 9 (140) (Apr. 2026), 40–63. DOI:https://doi.org/10.15587/1729-4061.2026.356119.