It seems more interesting to me that Rekdal doesn't cite this article:
http://www.bestthinking.com/articles/science/chemistry/bioch...
It's a 2012 followup by Mike Sutton to the two publications from 2010. It contains many new details, including a reference to Bunge (1892).
Perhaps, one should not only try to cite the original source, but also look for recent research on the same topic?