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V.V.MarcanoV.V. i inni, Occurrence of psilocybin and psilocin in ''Psilocybe pseudobullacea'' (Petch) Pegler from the Venezuelan Andes, „Journal of Ethnopharmacology”, 43 (2), 1994, s. 157–9, DOI: 10.1016/0378-8741(94)90013-2, PMID: 7967656.