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Sun, Xian Wen, Ying Ni Lin, Yong Jie Ding, Shi Qi Li, Hong Peng Li, و Qing Yun Li. "Bronchial Variation: Anatomical Abnormality May Predispose Chronic Obstructive Pulmonary Disease." Int J Chron Obstruct Pulmon Dis 2021.

Sun, Xian Wen, et al. "Bronchial Variation: Anatomical Abnormality May Predispose Chronic Obstructive Pulmonary Disease." Int J Chron Obstruct Pulmon Dis 2021.