Zyukin, D. A., Bystritskaya, A. Y., Golovin, A. A. y Vlasova, O. V. (2020) «The share of health care spending in the structure of GDP as a criterion for the healthcare system effectiveness», Revista de la Universidad del Zulia, 11(30), pp. 352-363. doi: 10.46925//rdluz.30.22.