References
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- Krause, G. R. (1945) The roentgen diagnosis of pulmonary infarcts. Radiology, 45, p. 107.
- Lofstedt, S.
- Schinz, Baensch Friedl (1939) Lehrbuch der Roentgendiagnostik, Leipzig
- Westermark, N. (1938) On the roentgen diagnosis of lung embolism. Acta Radiologica, 19, p. 357.