Poupaert, J., Winand, M., & Dumont, P. (1981). An Efficient Synthesis of “5-(phenyl-c-13(6)-5-phenylhydantoin. Journal of Labelled Compounds and Radiopharmaceuticals, 18(12), 1827-1829. https://hdl.handle.net/2078.5/90311 (Original work published 1981)