Sun, Y., X. Guo, L. Zhang, W. Zhang, and Y. Zuo. “Evaluation of Radiotherapy Combined With targeted therapy and Concurrent Radiotherapy, Chemotherapy in the Treatment of Non-Small Cell Lung Cancer With Brain Metastasis: Treatment of Non-Small Cell Lung Cancer”. Pakistan Journal of Medical Sciences, Vol. 36, no. 3, Mar. 2020, doi:10.12669/pjms.36.3.1626.