1. Roentgen diagnosis of lung embolism;Westermark;Acta Radiol,1938
2. Correlation of postmortem chest electroroentgenograms with autopsy findings, with special reference to pulmonary embolism and infarction;Hampton;Amer J Roentgenol,1940
3. Pulmonary embolism: incidence and significance;Towbin;JAMA,1954
4. Accuracy of the clinical diagnosis of pulmonary embolism;Hidner;JAMA,1967
5. The thromboembolism problem;Kirby;Amer J Med Sci,1948