Bajracharya, Gan Bahadur, et al. “Insight into the Structure Elucidation of Flavonoids ThroughUV-Visible Spectral Analysis of Quercetin Derivatives Using Shift Reagents”. Journal of Nepal Chemical Society, vol. 37, Dec. 2017, pp. 55-64, doi:10.3126/jncs.v37i0.32147.