Stijve T, Kuyper TW. (1985). "Occurrence of psilocybin in various higher fungi from several European countries". Planta Medica. 51 (5): 385–87. doi:10.1055/s-2007-969526. PMID17342589.
Stijve T, Kuyper TW. (1985). "Occurrence of psilocybin in various higher fungi from several European countries". Planta Medica. 51 (5): 385–87. doi:10.1055/s-2007-969526. PMID17342589.