“Spectroscopic and Nonlinear Optical Properties of Biologically Active 3‐(2/3/4‐Pyridyl)-4‐amino‐1,2,4‐triazole‐5‐thiones by Density Functional Theory Method”, EPSTEM, vol. 7, pp. 371–379, Nov. 2019, Accessed: Jan. 18, 2026. [Online]. Available: https://epstem.net/index.php/epstem/article/view/271