Baltadzhiev, I., Stoilova, J., Popivanova, N., Bazelova, H. Changes in the viral hepatitis B (VHB) morbidity 1987-2006. Sofia: 2009 39-40,.
Baltadzhiev, I., Stoilova, J., Popivanova, N., Bazelova, H. Changes in the viral hepatitis B (VHB) morbidity 1987-2006. Sofia: 2009 39-40,.
Baltadzhiev, I., Stoilova, J., Popivanova, N., Bazelova, H. (2009) Changes in the viral hepatitis B (VHB) morbidity 1987-2006, Sofia: 39-40,.
Baltadzhiev, I., Stoilova, J., Popivanova, N., & Bazelova, H. (2009). Changes in the viral hepatitis B (VHB) morbidity 1987-2006. Problems of infectious and parasitic diseases, 37 (1), 39-40.
Baltadzhiev I, Stoilova J, Popivanova N, Bazelova H. Changes in the viral hepatitis B (VHB) morbidity 1987-2006. Problems of infectious and parasitic diseases. 2009; 37(1): 39-40.