1. Physiology of the distal esophagus in achalasia;Hcitman, P.; Espinoza, J.; Csendes, A.;Scand J Gastroenterol
2. Motility studies in fifty patients with achalasia of the esophagus;Uribe, P.; Csendes, A.; Larrafn, A.; Ayala, M.;Am J Gastroenterol,1974
3. Prospective randomized study comparing forceful dilatation and esophagomyotomy in patients with achalasia
4. Long-term clinical, radiological and manometric follow-up period of patients with achalasia treated with pneumatic dilatation;Csendes, A.; Strauzer, T.;Digestion,1974
5. Long-term clinical, radiological and manometric follow-up period of patients with achalasia of the esophagus treated with esophagomyotomy;Csendes, A.; Larrain, A.; Strauzer, T.; Ayala, M.;Digestion,1975