Kumbhare, R.M., P.W. Chinchkhede, and V.N. Ingle. “Synthesis of Benzopyranopyrazoles”. Asian Journal of Chemistry 12, no. 2 (March 30, 2010): 501–505. Accessed October 3, 2024. https://asianpubs.org/index.php/ajchem/article/view/22986.