A. Bartalucci, L. Ryskalin, P. Parlanti, C. Demi, G. Vivacqua, and A. Paparelli, “The parkinsonism-inducing neurotoxin MPTP produces severe changes in the cervical spinal cord”, Ital J Anat Embryol, vol. 117, no. 2, p. 19, Feb. 2013.