Hassaneen, Hamdi Mahmoud, and Ahmad Sami Shawali. 2013. “Regioselective Synthesis of Some Functionalized 3,4’-Bis-(pyrazolyl)ketones and Chemoselectivity in Their Reaction With Hydrazine Hydrate”. European Journal of Chemistry 4 (2):102-9. https://doi.org/10.5155/eurjchem.4.2.102-109.723.