ISHAN KUMAR; RICHA SINGH CHAUHAN; ASHISH VERMA. Retrograde gastroesophageal intussusception: an exceedingly rare complication of Heller myotomy in a patient with achalasia cardia. Turkish Journal of Gastroenterology, [S. l.], v. 28, n. 4, p. 316–318, 2019. Disponível em: https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/3418. Acesso em: 6 jul. 2025.