Chee, Y. C., and S. Abdul Halim. “The “butterfly wings” and Midbrain ‘V’ Sign of Artery of Percheron Infarction”. Journal Of Cardiovascular, Neurovascular & Stroke, vol. 3, no. 3, Sept. 2021, pp. 56-58, doi:10.32896/cvns.v3n3.56-58.