Ahmed, Gyulyay, Ivan Petkov, and Stoyan Gutzov. “Optical Properties of Sol-Gel Materials Doped With Ethyl 2-(7-Hydroxy-2-Oxo-2H-Chromen-4-Yl) Acetate”. European Journal of Chemistry 1, no. 4 (December 22, 2010): 259–261. Accessed December 22, 2024. https://eurjchem.com/index.php/eurjchem/article/view/187.