“Formation and Optical Properties of Silver Nanoparticles in Li2B4O7–Gd2O3–Ag2O Borate Glass”. Ukrainian Journal of Physics 59, no. 10 (October 25, 2018): 1026. Accessed September 10, 2026. https://ujp.bitp.kiev.ua/index.php/uik/article/view/2018543.