Asghari, Sakineh, and Mohammad Qandalee. 2010. “A Facile and Efficient Reaction of Aromatic Aldehydes With the Isocyanide- Dialkylacetylenedicarboxylate Zwitter Ions: Formation of 2-Amino-5-Aryl Furan Derivatives”. Asian Journal of Chemistry 22 (5):3435-38. https://asianpubs.org/index.php/ajchem/article/view/11566.