Guduk, M., H. C. Cenkeri, A. Yilmaz, S. A. Uyanik, E. Atli, U. Oguslu, B. Yilmaz, and B. Gumus. “Diffusion Tensor Imaging Findings of Patients With parkinson’s Disease Refractory to Medical Treatment”. Annals of Medical Research, vol. 28, no. 6, June 2021, pp. 1223-7, https://annalsmedres.org/index.php/aomr/article/view/3815.