1. Megaoesophagus: an unusual cause of stridor;Thomas;QJM,2010
2. Achalasia cardia presenting as stridor;Wechalekar;Respirology,2008
3. Stridor from tracheal obstruction in a patient with achalasia;Panzini;Am J Gastroenterol,1993
4. Achalasia presenting as acute stridor;Dunlop;Eur J Gastroenterol Hepatol,1997
5. Life-threatening acute airway obstruction in achalasia;Wagh;MedGenMed,2004