Gebreyohanes, A. A., A. Belay, and G. Alemu. “Effect of Solvent Polarity on the Absorption and Fluorescence Spectra of Nicotinamide: Determination of Ground and Excited State Dipole Moments”. East European Journal of Physics, no. 4, Dec. 2022, pp. 190-9, doi:10.26565/2312-4334-2022-4-20.