Ibrahem, Ismail, Henrik Sundén, Ramon Rios, Gui-Ling Zhao, and Armando Córdova. “One-Pot Pyrrolidine-Catalyzed Synthesis of Benzopyrans, Benzothiopyranes, and Dihydroquinolidines”. CHIMIA 61, no. 5 (May 30, 2007): 219. Accessed May 1, 2024. https://www.chimia.ch/chimia/article/view/2007_219.