1. Spontaneous mediastinal emphysema;Hamman;Bull John Hopkins Hosp,1961
2. Spontaneous pneumomediastinum;McMahon;Am J Surg,1976
3. Pneumomediastinum;Millard;Chest,1969
4. Yellin A Gapani-Gapanavicius M Lieberman Y. Spontaneous pneumomediastinum; is it indeed a rare entity? Thorax (in press)
5. Pneumomediastinum;Munsell;JAMA,1967