@inbook{inbookcd60ad8b,
title   = {Failures of the heller operation: does initial dilatation affect the results of myotomy?},
author = {Pinotti, Henrique Walter and Zilberstein, Bruno and Cecconello, Ivan and Souza Campos, O and Santo, M A},
year = {1991},
publisher = {John Libbey Eurotext},
journal   = {Primary Motility Disorders of the Esophagus}
}