1. Reynolds JC, Parkman HP. Achalasia. Gastroenterol Clin North Am 1989; 18: 223-55.
2. Complications during pneumatic dilatation for achalasia or diffuse esophageal spasm. Analysis of risk factors, early clinical characteristics, and outcome;Nair, L.A.; Reynolds, J.C.; Parkman, H.P.; Ouyang, A.; Strom, B.L.; Rosato, E.F.;Dig Dis Sci,1993
3. Esophageal perforation during pneumatic dilatation for achalasia: a possible association with malnutrition;Fennerty, B.,1990
4. Complications of esophageal dilation and guideless for their prevention;Tubman, A.B.;Gastrointest Endosc,1981
5. Intrasphincteric botulinum toxin for the treatment of achalasia;Pasricha, P.J.; Ravich, W.J.; Hendrix, T.R.; Sostre, S.; Jones, B.; Kalloo, N.;NEnglJMed,1995