@inbook{inbook713c3aa6,
title   = {Long-term evaluation of gastroplasty in achalasia},
author = {Cecconello, Ivan and Rocha, J M R and Pollara, Wilson Modesto and Zilberstein, Bruno and Pinotti, Henrique Walter},
year = {1987},
publisher = {Springer-Verlag},
journal   = {Diseases of the Esophagus}
}