“Pharmacotherapeutic Follow-up to Patients With Parkinson’s Disease Using the Drugs Levodopa and Biperiden Hydrochloride: Interactions in Drug Treatment”. Research, Society and Development 11, no. 15 (November 10, 2022): e65111536721. Accessed December 5, 2025. https://rsdjournal.org/rsd/article/view/36721.