Singh, ParamdeepSandhu, ParambirSaggar, KavitaAhluwalia, Archana2012-09-142012-09-142010-11Singh Paramdeep, Sandhu Parambir, Saggar Kavita, Ahluwalia Archana. Annular pancreas. Indian Journal of Gastroenterology. 2010 Nov-Dec; 29(6): 250.http://imsear.searo.who.int/handle/123456789/141390enArticle