1. Pulmonary intracavitary fungus ball;Levin;Radiology,1956
2. The pulmonary air meniscus;Weens;Radiology,1950
3. The air meniscus as a radiographic finding: a review of the literature and presentation of nine unusual cases;Katz;CRC. Crit. Rev. Diag. Imaging.,1978
4. Echinococcus cyst of the lung;Evans;Radiology,1943
5. Round densities within cavities: lung lesions simulating the pathognomonic roentgenographic sign of echinococcus cyst;Bobrowitz;Am. Rev. Tuberc.,1944