A study of the reaction of urea with diacetyl monoxime and diacetyl Volume 5, Issues 1-4, March 1972, Pages 171-181 R. Lugosi, R.J. Thibert, W.J. Holland and L.K. Lam Clinical Biochemistry http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TDD-4F2M611-10&_user=8491443&_coverDate=03%2F31%2F1972&_rdoc=28&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235196%231972%23999949998%23546498%23FLP%23display%23Volume)&_cdi=5196&_sort=d&_docanchor=&_ct=45&_acct=C000050480&_version=1&_urlVersion=0&_userid=8491443&md5=b3e8cc38b722a814b525e49ece4113a3