1. Pulmonary complications of cardiospasm;Anderson;J. A. M. A.,1953
2. Achalasia (cardiospasm). Report of a case with extreme and unusual manifestations;Bello;Ann. Int. Med.,1950
3. Mega-esophagus as a cause of mediastinal widening;Hurst;Am. J. Roentgenol.,1944
4. Achalasia: Anatomy of the cardia as it relates to the regional pathophysiology;Palmer;Radiology,1956
5. Cardiospasm simulating mediastinal tumors;Perr;Am. Rev. Tuberc.,1951