Rana, N., S. Ma, C. Guo, M. Li, and M. Zhang. “Magnetic Resonance Spectroscopy Imaging of Medulla Oblongata and Substantia Nigra in Idiopathic Parkinson’s Disease”. Asian Journal of Medical Sciences, vol. 4, no. 3, June 2013, pp. 76-85, doi:10.3126/ajms.v4i3.8066.