Xie, Youhai, Yingling Wang, and Liqiang Wu. “One-Pot Synthesis of 7-Alkyl-6H,7H-naphtho[1’,2’:5,6]pyrano[3,2-c]chromen-6-Ones in Presence of Alum”. Asian Journal of Chemistry 23, no. 12 (September 26, 2011): 5377–5380. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/11155.