Marcano V, Morales Méndez A, Castellano F, Salazar FJ, Martinez L, Occurrence of psilocybin and psilocin in Psilocybe pseudobullacea (Petch) Pegler from the Venezuelan Andes, in Journal of ethnopharmacology, vol. 43, n. 2, luglio 1994, pp. 157–9, PMID7967656.
Marcano V, Morales Méndez A, Castellano F, Salazar FJ, Martinez L, Occurrence of psilocybin and psilocin in Psilocybe pseudobullacea (Petch) Pegler from the Venezuelan Andes, in Journal of ethnopharmacology, vol. 43, n. 2, luglio 1994, pp. 157–9, PMID7967656.