@incollection{:/content/chapter/10.22233/9781910443620.chap4, author = "Twedt, David", title = "Flexible endoscopy: oesophagoscopy", booktitle = "BSAVA Manual of Canine and Feline Endoscopy and Endosurgery", publisher = "British Small Animal Veterinary Association", year = "2020", pages = "47-55", url = "https://www.bsavalibrary.com/content/chapter/10.22233/9781910443620.chap4" }