@inbook{inbook080ce441,
title   = {Dilatation: what is the incidence of ger after dilatation?},
author = {Zilberstein, Bruno and Felix, V N and Cecconello, Ivan and Pinotti, Henrique Walter and Santo, M A},
year = {1991},
publisher = {John Libbey Eurotext},
journal   = {Primary Motility Disorders of the Esophagus}
}