References
- Laurell, Hugo (1928) Der Manometer, ein Hilfsmittel zur Erzielung scharfer Rontgenbilder respiratorisch beweglicher Organe. Acta radiol., 9, p. 478.
- Lindgren, E. (1946) Roentgen diagnosis of arterio-venous aneurysm of the lungs. Acta radiol., 27, p. 585.
- Westermark, Nils (1944) On the influence of the intra-alveolar pressure on the normal and pathological structures of the lungs. Acta radiol., 25, p. 874.