Abd Rashid, A. M., M. S. F. . Md Noh, A. H. K. . Yusof Khan, M. N. . Mohd Yaakob, N. . Bahari, and H. Basri. “Unilateral Loss of the Swallow Tail Sign in a Patient With Idiopathic Parkinson’s Disease”. Journal Of Cardiovascular, Neurovascular & Stroke, vol. 3, no. 3, Sept. 2021, pp. 59-62, doi:10.32896/cvns.v3n3.59-62.