Georgieva, Lidia и др. Bulgaria Health system review // Health Systems in Transition 9 (1). European observatory on health systems and policies, 2007. с. xvi, 1, 2, 3, 12. Архивиран от оригинала на 2022-10-09.
Georgieva, Lidia и др. Bulgaria Health system review // Health Systems in Transition 9 (1). European observatory on health systems and policies, 2007. с. xvi, 1, 2, 3, 12. Архивиран от оригинала на 2022-10-09.