Foroughifar, N., and A. Mobinikhaledi. “A Convenient Synthesis of Azomethine Imines and Their Cycloaddition Reactions With Some Dipolarophiles”. Asian Journal of Chemistry, vol. 14, no. 3, July 2012, pp. 1441-52, https://asianpubs.org/index.php/ajchem/article/view/22419.