ASHNAGAR, A., and J.M. BRUCE. “Synthesis of Diels-Alder Bis-Adducts of Methoxycarbonyl-1,4-Benzoquinone”. Asian Journal of Chemistry 22, no. 6 (May 17, 2010): 4602–4610. Accessed April 15, 2025. https://asianpubs.org/index.php/ajchem/article/view/16817.