BERDNYK, O.V. The issues of comorbidity in the public health system. Environment & Health, Kyiv, Ukraine, v. 84, n. 4, p. 48–52, 2017. DOI: 10.32402/dovkil2017.04.048. Disponível em: https://dovkil-zdorov.kiev.ua/journal/article/view/454. Acesso em: 26 aug. 2026.