H.S. Ammida, Nagwa, and Abdalla Giath. “Application of Michael Reaction on 3-Methyl-1-Phenylpyrazolin-5-One With Arylmethylenecyanoacetic Acid Ethyl Esters ”. Asian Journal of Chemistry, vol. 15, no. 2, Mar. 2010, pp. 616-20, https://asianpubs.org/index.php/ajchem/article/view/21650.