1. Overcoming obstacles in Parkinson’s disease;Sherer;Mov. Disord.,2012
2. Chou, K.L. (2023, June 20). Clinical manifestations of Parkinson disease. UpToDate. Available online: https://www.medilib.ir/uptodate/show/4903.
3. Beitz, J.M. (2023, June 20). Parkinson’s Disease: A Review, Available online: https://pubmed.ncbi.nlm.nih.gov/24389262/.
4. Parkinson’s disease: A review;Radhakrishnan;Neurol. India,2018
5. Staging of brain pathology related to sporadic Parkinson’s disease;Braak;Neurobiol. Aging,2003