1. (a) Plöchl, J. Ber. 1884, 17, 1616-1624.
2. (b) Erlenmeyer, E., Jr. Ann. 1893, 275, 1-3. Emil Erlenmeyer, Jr. (1864-1921) was born in Heidelberg, Germany to Emil Erlenmeyer, Sr. (1825-1909), a famous chemistry professor at the University of Heidelberg. He investigated the Erlenmeyer-Plöchl azlactone synthesis while he was a Professor of Chemistry at Strasburg. The Erlenmeyer flasks " " are ubiquitous in chemistry laboratories.
3. Buck, J. S.; Ide, W.S. Org. Synth. Coll. II, 1943, 55.
4. Carter, H. E. Org. React.
1946, 3, 198–239. (Review).
5. Baltazzi, E. Quart. Rev. Chem. Soc.
1955, 9, 150–173. (Review).