Sauer, Stephan, Christian Staehelin, Caroline Wyss, and Bernd Giese. “Selective Photocyclization of Amino Acids in Dipeptides”. CHIMIA 51, no. 1-2 (February 26, 1997): 23. Accessed February 27, 2024. https://www.chimia.ch/chimia/article/view/1997_023.