Symptomatic gastroesophageal reflux: Incidence and precipitating factorsOtto T. Nebel, Donald O. Castell, Michael F. Fornes|Digestive Diseases and Sciences|1976Cited by 884
Lower Esophageal Sphincter Pressure Changes After Food IngestionOtto T. Nebel, Donald O. Castell|Gastroenterology|1972Cited by 226