“Calculation of Shifting in Energy Levels for Ln3+ (Pr3+, Nd3+) Complex’s With Hetero Cyclic Ligands in Solution State by Using Optical Absorption Spectra”. NextGen Chemical Discoveries , vol. 2, no. 3, Aug. 2026, pp. 15-22, https://novalexpress.com/NGCD/index.php/ngcd/article/view/41.