Holzapfel, C. W. (1968). «The isolation and structure of cyclopiazonic acid, a toxic metabolite of Penicillium cyclopium Westling». Tetrahedron. 24 (5): 2101–2119. PMID5636916. doi:10.1016/0040-4020(68)88113-X
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Holzapfel, C. W. (1968). «The isolation and structure of cyclopiazonic acid, a toxic metabolite of Penicillium cyclopium Westling». Tetrahedron. 24 (5): 2101–2119. PMID5636916. doi:10.1016/0040-4020(68)88113-X
Sosa, M. J.; Córdoba, J. J.; Díaz, C; Rodríguez, M; Bermúdez, E; Asensio, M. A.; Núñez, F (2002). "Production of cyclopiazonic acid by Penicillium commune isolated from dry-cured ham on a meat extract-based substrate". Journal of food protection 65 (6): 988–92. PMID 12092733 (PubMed)