Bull. Chem. Soc. Jap., 66 (1993) N 2, P. 477-482.
The effect of solvent on the synthesis of pyridazinones and some reactions of the new compounds.
Sayed Galal Hosni, Radwan Azza, Hamed Ashraf Ahmed, Boraie Waleed El-Sayed.
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http://dx.doi.org/10.1246/bcsj.66.477