1. Eosinophilic esophagitis: Strictures, impactions, dysphagia;Khan;Gastroenterology,2000
2. Nonspecific esophageal motility disorders in children without gastroesophageal reflux;Rosario;J Pediatr Gastroenterol Nutr,1999
3. Pediatric therapeutic endoscopy: Strictures of the upper gastrointestinal tract and achalasia;Wyllie;Practical Gastroenterol,1997