A. Hannan, B. Islam, M. Hussain, M. Haque, and M. Kudrat-E-Khuda, “Early Complications of Suture Closure of Perforated Duodenal Ulcer: A Study of 100 Cases”, TAJ: J of Teachers Assoc, vol. 18, no. 2, pp. 122–126, Sep. 2009.