Michael W. Beug, Marilyn Shaw, and Kenneth W. Cochran. Thirty plus Years of Mushroom Poisoning: Summary of the Approximately 2,000 Reports in the NAMA Case Registry. From summary at «Archived copy». Arxivat de l'original el 20 de juliol de 2011. [Consulta: 12 abril 2011].
Michael W. Beug, Marilyn Shaw, and Kenneth W. Cochran. Thirty plus Years of Mushroom Poisoning: Summary of the Approximately 2,000 Reports in the NAMA Case Registry. From summary at «Archived copy». Arxivat de l'original el 20 de juliol de 2011. [Consulta: 12 abril 2011].