38. PMID 16203016. doi:10.1016/j.lfs.2005.09.003.Ramsbottom, p 43.Letcher, p 126.Sacred Weeds: Fly Agaric, BBC documentary presented by Dr Andrew Sherratt, The Reader in European Pre-History at the University of Oxford (prior to his resignation, formerly Professor of Archaeology, University of Oxford). Documentary released 1998-08-10. Relevant material