Deswanto, I. A., and J. F. Barus. “Annular Pancreas: The Failure of Side-to-Side Gastrojejunostomy Anastomosis and the Success of Repair With Roux-En-Y Gastrojejunostomy”. Medical Journal of Indonesia, vol. 24, no. 2, June 2015, pp. 115-9, doi:10.13181/mji.v24i2.1207.