S. Muratović et al., “Evaluation of Purity of some Coumarin Derivatives by Melting Point Measurments, TLC and Scanning Densitometry”, Glas. hem. tehnol. Bosne Herceg., vol. 41, pp. 15–19, Dec. 2013, Accessed: Oct. 04, 2026. Available: https://www.glashem.pmf.unsa.ba/index.php/bctbh/article/view/112