Seck, T.M. et al. 2020. Synthesis of mono and bis-substituted asymmetrical compounds, (1-(pyridin-2-yl)ethylidene)carbonohydrazide and 1-(2’-hydroxybenzylidene)-5-(1’-pyridylethylidene)carbonohydrazone: Structural characterization and antioxidant activity study. European Journal of Chemistry. 11, 4 (Dec. 2020), 285–290. DOI:https://doi.org/10.5155/eurjchem.11.4.285-290.2023.