Marko, I., Tsukazaki, M., Giles, PR., Brown, S., & Urch, C. J. (1997). Anaerobic copper-catalyzed oxidation of alcohols to aldehydes and ketones. Angewandte Chemie: International Edition in English, 36(20), 2208-2210. https://doi.org/10.1002/anie.199722081 (Original work published 1997)