LudlowA.: Obstructed Deglutition, from a Preternatural Dilatation of, and Bag Formed in, the Pharynx. Med. Obs. Soc. Physicians (London)3:85–101, 1762–1776.
2.
BellC.: Surgical Observations. Longman (and others), London, pp. 64–70, 1816.
3.
Niehans, cited by ZesasG.: Beitrag zur Chirurgischen Behandlung des Speisenroehren-Divertikels. Deut. Zschr. Chir.82:577, 1906.