F. Altalbawy, M. Abdelkader, E. Darwish, and M. Elnagdi, “Synthesis, Electronic Absorption, Fluorescence and Live Time Spectroscopic Study of Some New 3,7-Disubstituted Coumarin Derivatives as New Fluorescent Probes”, ajc, vol. 28, no. 10, pp. 2303–2310, Jun. 2016.