http://leda.lycaeum.org/Taxonomy/Anadenanthera.78.shtml (http://leda.lycaeum.org/Taxonomy/Anadenanthera.78.shtml)
http://www.zauberpilz.com/golden/g81-90.htm (http://www.zauberpilz.com/golden/g81-90.htm)
http://www.erowid.org/plants/anadenanthera/anadenanthera.shtml (http://www.erowid.org/plants/anadenanthera/anadenanthera.shtml)