Bhalla, Lucky, Vineet Sehgal, Priyanshu Bansal, and Shaifali Arora. “A Case of Dengue Encephalitis With Double Doughnut Sign”. Asian Journal of Medical Radiological Research 9, no. 2 (December 24, 2021): 48-50. Accessed August 8, 2022. https://aijournals.com/index.php/ajmrr/article/view/2177.