Morucci, G., M. Gulisano, S. Pacini, J. J. Branca, and M. Ruggiero. “Cadmium and Myalgic encephalomyelitis/chronic Fatigue Syndrome; Application of Transcranial Sonography to the Study of Cadmium-Induced Neuronal Damage”. Italian Journal of Anatomy and Embryology, vol. 117, no. 2, Feb. 2013, p. 131, https://oajournals.fupress.net/index.php/ijae/article/view/4317.