“Computational Insights into Functionalized Calcein Derivatives (D1–D5) for Enhanced Nonlinear Optical Response: A DFT-Based Study”. Annual Methodological Archive Research Review 3, no. 10 (October 29, 2025): 1013–1022. Accessed October 17, 2026. https://www.amresearchjournal.com/index.php/Journal/article/view/1068.