Poncelet, F., Mercier, M., & Lederer, J. (1980). Saccharin - Para Forms of Some Impurities Are Not Mutagenic in Salmonella-typhimurium. Food and Cosmetics Toxicology, 18(4), 453. https://doi.org/10.1016/0015-6264(80)90236-9 (Original work published 1980)