References
- Andreassi, G. (1936) I rapporti del segmento terminale della vena azygos. Ann. Radiol. Fis. Med., 10, p. 53.
- Gruber Uber die Valvulae der Vena aziga und ihrer Aste
- Sylwanowicz, W. (1931) Sur les valvules du systeme des azygos. C. R. Ass. Anat., 26, p. 503.
- Tori, G. (1954) The radiological demonstration of the azygos and other thoraco-abdominal veins in the living. Brit. J. Radiol., 27, p. 16.
- Tori, G. and Garusi, G. F. Azygos vein arch and its valvular apparatus. Angiographic observations