Giger, Rudolf K.A., and Günter Engel. “Albert Hofmann’s Pioneering Work on Ergot Alkaloids and Its Impact on the Search of Novel Drugs at Sandoz, a Predecessor Company of Novartis: Dedicated to Dr. Albert Hofmann on the Occasion of His 100th Birthday”. CHIMIA, vol. 60, no. 1-2, Feb. 2006, p. 83, doi:10.2533/000942906777675164.