Volwiler, E. H.; Tabern, D. L. 5,5-SUBSTITUTED BARBITURIC ACIDS1. Journal of the American Chemical Society (American Chemical Society (ACS)). 1930, 52 (4): 1676–1679. ISSN 0002-7863. doi:10.1021/ja01367a061.
GB patent 650354,Wilde, B. E. & Balaban, I. E.,「Improvements in the manufacture of substituted barbituric and thiobarbituric acids」,发行于1951-02-21,指定于Geigy
Volwiler, E. H.; Tabern, D. L. 5,5-SUBSTITUTED BARBITURIC ACIDS1. Journal of the American Chemical Society (American Chemical Society (ACS)). 1930, 52 (4): 1676–1679. ISSN 0002-7863. doi:10.1021/ja01367a061.