Kaur, Navdeep, Amandeep Kaur, and Harvinder Singh Chhabra. “Bull’s Eye Sign – A Diagnostic Clinch in COVID-19 Pneumonia”. Monaldi Archives for Chest Disease 92, no. 1 (September 28, 2021). Accessed April 29, 2024. https://www.monaldi-archives.org/macd/article/view/1908.