Nguyen Viet Phu, Nguyen Thi Mai Phuong, Dang Huu Duc, Vuong Trong Hieu, Tran Thi Hang, Nguyen Thien Phong, Le Hong Phuc, and Pham Nu Hanh Van. “Direct Hospitalisation Cost of Patients With Chronic Obstructive Pulmonary Disease, Covered by the National Health Insurance at Vinh Phuc General Hospital from 2015 to 2019”. Vietnam Journal of Science, Technology and Engineering, vol. 66, no. 4, Dec. 2024, pp. 22-28, doi:10.31276/VJSTE.2023.0009.